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A large-area multi-fingerβ-Ga2O3 MOSFET and its self-heating effect 认领 引用 被引量：3
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作者 Xuanze Zhou Guangwei Xu Shibing Long 《Journal of Semiconductors》 EI CAS CSCD 2023年第7期37-40,共4页
The self-heating effect severely limits device performance and reliability.Although some studies have revealed the heat distribution ofβ-Ga2O3 MOSFETs under biases,those devices all have small areas and have di... The self-heating effect severely limits device performance and reliability.Although some studies have revealed the heat distribution ofβ-Ga2O3 MOSFETs under biases,those devices all have small areas and have difficulty reflecting practical con-ditions.This work demonstrated a multi-fingerβ-Ga2O3 MOSFET with a maximum drain current of 0.5 A.Electrical characteris-tics were measured,and the heat dissipation of the device was investigated through infrared images.The relationship between device temperature and time/bias is analyzed. 展开更多
关键词 β-Ga2O3 MOSFET multi-finger self-heating effect
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A new physics-based self-heating effect model for 4H-SiC MESFETs 认领 引用 被引量：1
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作者 曹全君 张义门 张玉明 《Chinese Physics B》 SCIE EI CAS 2008年第12期4622-4626,共5页
A new self-heating effect model for 4H-SiC MESFETs is proposed based on a combination of an analytical and a computer aided design （CAD） oriented drain current model. The circuit oriented expressions of 4H-SiC low-f... A new self-heating effect model for 4H-SiC MESFETs is proposed based on a combination of an analytical and a computer aided design （CAD） oriented drain current model. The circuit oriented expressions of 4H-SiC low-field electron mobility and incomplete ionization rate, which are related to temperature, are presented in this model, which are used to estimate the self-heating effect of 4H-SiC MESFETs. The verification of the present model is made, and the good agreement between simulated results and measured data of DC I - V curves with the self-heating effect is obtained. 展开更多
关键词 4H silicon carbide metal semiconductor field effect transistor self-heating effect com puter aided design
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Analytical workload dependence of self-heating effect for SOI MOSFETs considering two-stage heating process 认领 引用
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作者 李逸帆 倪涛 +13 位作者 李晓静 王娟娟 高林春 卜建辉 李多力 蔡小五 许立达 李雪勤 王润坚 曾传滨 李博 赵发展 罗家俊 韩郑生 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第9期522-529,共8页
Dynamic self-heating effect(SHE)of silicon-on-insulator(SOI)MOSFET is comprehensively evaluated by ultrafast pulsed I-V measurement in this work.It is found for the first time that the SHE complete heating response an... Dynamic self-heating effect(SHE)of silicon-on-insulator(SOI)MOSFET is comprehensively evaluated by ultrafast pulsed I-V measurement in this work.It is found for the first time that the SHE complete heating response and cooling response of SOI MOSFETs are conjugated,with two-stage curves shown.We establish the effective thermal transient response model with stage superposition corresponding to the heating process.The systematic study of SHE dependence on workload shows that frequency and duty cycle have more significant effect on SHE in first-stage heating process than in the second stage.In the first-stage heating process,the peak lattice temperature and current oscillation amplitude decrease by more than 25 K and 4%with frequency increasing to 10 MHz,and when duty cycle is reduced to 25%,the peak lattice temperature drops to 306 K and current oscillation amplitude decreases to 0.77%.Finally,the investigation of two-stage(heating and cooling)process provides a guideline for the unified optimization of dynamic SHE in terms of workload.As the operating frequency is raised to GHz,the peak temperature depends on duty cycle,and self-heating oscillation is completely suppressed. 展开更多
关键词 self-heating effect(SHE) silicon-on-insulator(SOI)MOSFETs thermal transient response workload
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Numerical Simulation of the Self-Heating Effect Induced by Electron Beam Plasma in Atmosphere 认领 引用 被引量：4
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作者 邓永锋 谭畅 +1 位作者 韩先伟 谭永华 《Plasma Science and Technology》 SCIE EI CAS CSCD 2012年第2期89-93,共5页
For exploiting advantages of electron beam air plasma in some unusual applications, a Monte Carlo （MC） model coupled with heat transfer model is established to simulate the characteristics of electron beam air plasm... For exploiting advantages of electron beam air plasma in some unusual applications, a Monte Carlo （MC） model coupled with heat transfer model is established to simulate the characteristics of electron beam air plasma by considering the self-heating effect. Based on the model, the electron beam induced temperature field and the related plasma properties are investigated. The results indicate that a nonuniform temperature field is formed in the electron beam plasma region and the average temperature is of the order of 600 K. Moreover, much larger volume pear-shaped electron beam plasma is produced in hot state rather than in cold state. The beam ranges can, with beam energies of 75 keV and 80 keV, exceed 1.0 m and 1.2 m in air at pressure of 100 torr, respectively. Finally, a well verified formula is obtained for calculating the range of high energy electron beam in atmosphere. 展开更多
关键词 electron bean： plasma simulation self-heating GEANT4
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Electrothermal simulation of the self-heating effects in 4H-SiC MESFETs 认领 引用 被引量：4
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作者 吕红亮 张义门 +1 位作者 张玉明 车勇 《Chinese Physics B》 SCIE EI CAS 2008年第4期1410-1414,共5页
A thermal model of 4H-SiC MESFET is developed based on the temperature dependences of material parameters and three-region I - V model. The static current characteristics of 4H-SiC MESFET have been obtained with the c... A thermal model of 4H-SiC MESFET is developed based on the temperature dependences of material parameters and three-region I - V model. The static current characteristics of 4H-SiC MESFET have been obtained with the consideration of the self-heating effect on related parameters including electron mobility, saturation velocity and thermal conductivity. High voltage performances are analysed using equivalent thermal conductivity model. Using the physicalbased simulations, we studied the dependence of self-heating temperature on the thickness and doping of substrate. The obtained results can be used for optimization of the thermal design of the SiC-based high-power field effect transistors. 展开更多
关键词 4H-SiC MESFET self-heating analytic model
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Impact of ambient temperature on the self-heating effects in FinFETs 认领 引用 被引量：3
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作者 Longxiang Yin Gang Du Xiaoyan Liu 《Journal of Semiconductors》 CAS CSCD 2018年第9期74-81,共8页
We use an electro-thermal coupled Monte Carlo simulation framework to investigate the self-heating effect（SHE） in 14 nm bulk n Fin FETs with ambient temperature（TA） from 220 to 400 K. Based on this method, nonloca... We use an electro-thermal coupled Monte Carlo simulation framework to investigate the self-heating effect（SHE） in 14 nm bulk n Fin FETs with ambient temperature（TA） from 220 to 400 K. Based on this method, nonlocal heat generation can be achieved. Contact thermal resistances of Si/Metal and Si/Si O_2 are selected to ensure that the source and drain heat dissipation paths are the first two heat dissipation paths. The results are listed below：（i） not all input power（Q_（input） turns into heat generation in the device region and some is taken out by the thermal non-equilibrium carriers, owing to the serious non-equilibrium transport;（ii） a higher TA leads to a larger ratio of input power turning into heat generation in the device region at the same operating voltages;（iii） SHE can lead to serious degradation in the carrier transport, which will increase when TA increases;（iv） the current degradation can be 8.9% when Vds = 0.7 V, Vgs = 1 V and TA = 400 K;（v） device thermal resistance（Rth） increases with increasing of TA, which is seriously impacted by the non-equilibrium transport. Hence, the impact of TA should be carefully considered when investigating SHE in nanoscale devices. 展开更多
关键词 self-heating effects ambient temperature FinFET Monte Carlo method
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A novel interconnect optimal buffer insertion model considering the self-heating effect 认领 引用 被引量：1
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作者 张岩 董刚 +4 位作者 杨银堂 王宁 丁尧舜 刘晓贤 王凤娟 《Journal of Semiconductors》 EI CAS CSCD 2013年第11期118-123,共6页
Considering the self-heating effect, an accurate expression for the global interconnection resistance per unit length in terms of interconnection wire width and spacing is presented. Based on the proposed resistance m... Considering the self-heating effect, an accurate expression for the global interconnection resistance per unit length in terms of interconnection wire width and spacing is presented. Based on the proposed resistance model and according to the trade-off theory, a novel optimization analytical model of delay, power dissipation and bandwidth is derived. The proposed optimal model is verified and compared based on 90 nm, 65 nm and 40 nm CMOS technologies. It can be found that more optimum results can be easily obtained by the proposed model. This optimization model is more accurate and realistic than the conventional optimization models, and can be integrated into the global interconnection design ofnano-scale integrated circuits. 展开更多
关键词 self-heating effect interconnection wire resistance per unit length optimal model very large scale integration
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Numerical analysis of the self-heating effect in SGOI with a double step buried oxide 认领 引用
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作者 李斌 刘红侠 +2 位作者 李劲 袁博 曹磊 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2011年第3期42-48,共7页
To reduce the self-heating effect of strained Si grown on relaxed SiGe-on-insulator（SGOI） n-type metal-oxide-semiconductor field-effect transistors（nMOSFETs）,this paper proposes a novel device called double step b... To reduce the self-heating effect of strained Si grown on relaxed SiGe-on-insulator（SGOI） n-type metal-oxide-semiconductor field-effect transistors（nMOSFETs）,this paper proposes a novel device called double step buried oxide（BOX） SGOI,investigates its electrical and thermal characteristics,and analyzes the effect of self-heating on its electrical parameters.During the simulation of the device,a low field mobility model for strained Si MOSFETs is established and reduced thermal conductivity resulting from phonon boundary scattering is considered.A comparative study of SGOI nMOSFETs with different BOX thicknesses under channel and different channel strains has been performed.By reducing moderately the BOX thickness under the channel,the channel temperature caused by the self-heating effect can be effectively reduced.Moreover,mobility degradation,off state current and a short-channel effect such as drain induced barrier lowering can be well suppressed.Therefore,SGOI MOSFETs with a thinner BOX under the channel can improve the overall performance and long-term reliability efficiently. 展开更多
关键词 self-heating effect step BOX SGOI mobility model numerical analysis
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Unraveling the threshold and interaction effects of environmental variables on cadmium contamination in rice grains 认领 引用 被引量：1
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作者 Yang Zeng Chen Shen +3 位作者 Bolun Zhang Jie Ren Zhanbin Huang Hong Hou 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期450-460,共11页
Understanding Cd contamination in the soil-rice ecosystem and the underlying its threshold and interaction effects is crucial for controlling Cd pollution and ensuring food safety.Although the quantitative relationshi... Understanding Cd contamination in the soil-rice ecosystem and the underlying its threshold and interaction effects is crucial for controlling Cd pollution and ensuring food safety.Although the quantitative relationships between Cd and environmental variables have been extensively studied,the threshold and interaction effects of multi-source environmental variables remain largely unexplored.This study employs a combination of random forest analysis and a human health risk model to investigate the effects of variables on Cd levels in rice grains,with the goal of quantifying their contributions and elucidating their relationships.The results indicated that the 15 selected variables collectively explained 47.36%of the variation in Cd content,with the top three variables being soil pH,distance from industrial park,and soil Zn.The majority of variables exhibited threshold effects on Cd levels in rice grains.By visualizing the interaction between Soil pH,distance from industrial park,and soil Zn with Cd levels in rice,we demonstrate the threshold effects of them on Cd level in rice grains,thereby providing further insight into the variation observed.Furthermore,oral intake of rice has been identified as the primary route of human exposure,significantly contributing to overall exposure pathways.Understanding these interactions is crucial for gaining insights into the underlying processes driving Cd pollution and fostering sustainable development within the industry.Our findings underscore the crucial need to consider multiple environmental variables and their interactions when managing heavy metals(HMs)contamination and mitigating health risks. 展开更多
关键词 Heavy metals Rice Threshold effects Machine learning Health risk
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Mechanical response and deformation mechanism of Zr-Ti-Nb-Ta-Al refractory high-entropy alloy under the synergistic effects of temperature and strain rate 认领 引用 被引量：2
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作者 Zhanxuan Wang Yongkang Zhou +7 位作者 Heling Zheng Mingyang Wang Xintian Li Xiancheng Li Zhengkun Li Zhonghua Du Lizhi Xu Zhengwang Zhu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2026年第1期65-79,共15页
This study synthesized a high-strength Zr42Ti15Nb20Ta20Al3(at.%)refractory high-entropy alloy(RHEA)via vacuum induction melting.The mechanical behavior of the Zr42Ti15Nb_(2 n)Ta_(2 n)Al3RHEA wa... This study synthesized a high-strength Zr42Ti15Nb20Ta20Al3(at.%)refractory high-entropy alloy(RHEA)via vacuum induction melting.The mechanical behavior of the Zr42Ti15Nb_(2 n)Ta_(2 n)Al3RHEA was systematically investigated through a universal testing machine and split Hopkinson pressure bar system at strain rates up to 5100 s−1,and the temperature change is from 193 K to 673 K.By integrating theoretical derivation and microstructural characterization,we examined the mechanical behavior and deformation mechanisms of the Zr42Ti15Nb_(2 n)Ta_(2 n)Al3RHEA under the synergistic effects of temperature and strain rate.The results demonstrate that the Zr42Ti15Nb_(2 n)Ta_(2 n)Al3RHEA exhibits a significant positive strain rate effect.The dominant deformation mechanism changes with increasing strain rate:cross-slip→localized shear→adiabatic shear.When the strain rate reaches 5100 s−1,the yield strength increases from 1151 MPa to 2112 MPa,and an adiabatic shear band forms.Simultaneously,the microstructure undergoes severe localized deformation,dominated by shear bands,and dynamic recrystallization(DRX)is activated to counteract the deformation.At 193 K,the yield strength is 2241 MPa.Kink bands have appeared,enhancing the ductility of RHEA:the yield strength and the temperature sensitivity coefficient decrease with increasing temperature.However,as the temperature increases,atomic mobility is enhanced,which promotes grain boundary sliding and migration,activating DRX,and effectively mitigating shear localization.This study deepens our understanding of the mechanical properties and deformation mechanisms of the Zr42Ti15Nb20Ta20Al3RHEA.It reveals the microstructure evolution process of the alloy under different strain rates,the synergistic effect of strain rate and temperature,and the influence of strain rate and temperature on the deformation mechanisms of the material.This research lays a theoretical foundation for applying the Zr42Ti15Nb20Ta20Al3RHEA in extreme environments. 展开更多
关键词 Refractory high entropy alloy Temperature effect Strain rate Mechanical properties Deformation mechanism
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Uneven gains from agricultural modernization:Spatial spillover effects and regional heterogeneity of grain yield in China’s nine major agricultural zones 认领 引用 被引量：1
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作者 LIANG Jiale PAN Sipei +3 位作者 XIA Nan WANG Zhenkang CHEN Wanxu LI Manchun 《Journal of Geographical Sciences》 SCIE CSCD 2026年第3期575-596,共22页
Ensuring national food security amidst rapid population growth and increasing extreme weather events remains a critical global challenge.However,the extent to which agricultural modernization in China enhances grain y... Ensuring national food security amidst rapid population growth and increasing extreme weather events remains a critical global challenge.However,the extent to which agricultural modernization in China enhances grain yield and contributes to food security remains unclear.Therefore,using panel data from 327 Chinese cities(2013–2021),this study employs spatial econometric models to analyze the spatial spillover effects of agricultural modernization level(AML)on grain yield and to reveal regional heterogeneity across nine major agricultural zones.The results showed a cumulative grain yield increase of 23.7 million tons,with peak productivity concentrated along the Hu Line and declining eastward and westward.AML also exhibited a steady increase but a clear spatial gradient,decreasing from coastal to inland regions,with the highest level observed in Southern China(SC).A key finding was that a 1%increase in AML directly raised local grain yield by an average of 4.185%,accompanied by significant positive spillover effects on neighboring regions.Regional variations revealed distinct patterns:the direct effects of AML were more pronounced in southern and eastern zones,while spillover effects dominated in northern and western zones.The largest positive direct impact of AML on grain yield was observed in the SC(8.499%),while Middle-Lower Yangtze Plain ranked second but exhibited the strongest positive spatial spillover effect(4.534%).These findings highlight the critical role of agricultural modernization in promoting grain production and provide a solid basis for optimizing regional agricultural systems,ensuring food security,and advancing sustainable agriculture. 展开更多
关键词 agricultural modernization grain yield spatial spillover effects nine major agricultural zones China
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Spatial vibration analysis of thin-walled box girders subject to moving random loads considering the shear effect 认领 引用 被引量：1
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作者 Yong Cai Laifu Zhang +1 位作者 Qiqi Feng Xiaoyong Lv 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第4期195-210,共16页
This research provides analytical solutions to assess the bending-torsional vibration behavior of a thin-walled box girder subjected to moving random loads.The governing equations of a thin-walled box girder have been... This research provides analytical solutions to assess the bending-torsional vibration behavior of a thin-walled box girder subjected to moving random loads.The governing equations of a thin-walled box girder have been formulated to incorporate the impact of shear effect.The technique of integral transformation and the method of statistical analysis are employed to determine the average and standard deviation of the displacements at mid-span.The research’s findings are compared with the results from the Newmark-βtechnique and the Monte Carlo method to validate the effectiveness of the proposed strategy.By analysing the parameters,it is confirmed that neglecting the shear effect can result in substantial underestimation of lateral displacement.Compared to the Euler-Bernoulli beam theory,which does not consider the shear effect,the proposed theory shows differences of up to 109%in the average value and 213%in the standard deviation.These analysis results provide a reference for the vibration analysis of thin-walled box girders. 展开更多
关键词 Analytical solutions Bending-torsional vibration Thin-walled box girder Moving random loads Shear effect
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The importance of properly correcting the electric double layer effect in unravelling the intrinsic kinetics of electrode reactions 认领 引用 被引量：2
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作者 Bingyu Liu Erfei Zhen +3 位作者 Wei Chen Lulu Zhang Jun Cai Yanxia Chen 《Nano Materials Science》 EI CAS CSCD 2026年第4期866-872,共7页
Understanding the effects of the electric double layer(EDL)on electrode kinetics is of great importance for improving the performance of electrochemical devices.In this work,by using the HER at Au(111)in x M HClO4+... Understanding the effects of the electric double layer(EDL)on electrode kinetics is of great importance for improving the performance of electrochemical devices.In this work,by using the HER at Au(111)in x M HClO4+(1-x)M NaClO4or NaOH as a model reaction,the intrinsic kinetic parameters for HER has been unveiled based on the modified Poisson-Nernst-Planck equations and the Frumkin-Butler-Volmer theory.Our analysis reveals that i)the EDL effects induced changes in proton concentration cH+RPand electric potential φRPat the reaction plane are the main reason for the difference of HER current in the cases with x M HClO4and x M HClO4+(1-x)M NaClO4;ii)the EDL effects are the main origin for the difference in HER current between acidic and alkaline solutions at the Au(111).Our work demonstrates that microkinetic simulation with properly considering the EDL effects is important for unravelling intrinsic reaction kinetics of electrocatalytic reactions. 展开更多
关键词 Hydrogen evolution reaction Proton discharge Au(111)electrode-electrolyte interface Electric double layer effects
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Modeling of self-heating effects in polycrystalline silicon thin film transistors 认领 引用 被引量：1
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作者 邓婉玲 郑学仁 《Journal of Semiconductors》 EI CAS 北大核心 2009年第7期44-47,共4页
An analytical DC model accounting for the self-heating effect of polycrystalline silicon thin-film transistors（poly-Si TFTs） is presented.In deriving the model for the self-heating effect, the temperature dependence... An analytical DC model accounting for the self-heating effect of polycrystalline silicon thin-film transistors（poly-Si TFTs） is presented.In deriving the model for the self-heating effect, the temperature dependence of the effective mobility is studied in detail.Based on the mobility model and a first order approximation, a closed-form analytical drain current model considering the self-heating effect is derived.Compared with the available experimental data, the proposed model, which includes the self-heating and kink effects, provides an accurate description of the output characteristics over the linear, the saturation, and the kink regimes. 展开更多
关键词 polycrystalline silicon thin film transistors self-heating surface potential
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Regulating the proton supply effect on chlorine-doped bismuth for enhanced electroreduction CO2 to formate 认领 引用 被引量：1
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作者 Xiao Li Chaoqiong Fang +1 位作者 Riming Hu Jiayuan Yu 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期611-615,共5页
Electrochemical CO2 reduction reaction(CO2RR) into valuable formate provides a strategy for carbon neutrality.Bismuth(Bi) catalysts,attributed to their appropriate energy barrier of OCHO*intermediate,have demons... Electrochemical CO2 reduction reaction(CO2RR) into valuable formate provides a strategy for carbon neutrality.Bismuth(Bi) catalysts,attributed to their appropriate energy barrier of OCHO*intermediate,have demonstrated substantial potential for the advancement of electrocatalytic CO2 reduction to formate.However,due to the weak bonding of protons(H*) of Bi,the available protonate of CO2 on Bi is insufficient,which limits the formation of OCHO*.Prediction by theoretical calculation,chlorine doping can effectively promote the dissociation of H2O and thus achieve effective proton supply.We prepare chlorine-doped Bi(Cl-Bi) via an electrochemical conversion strategy for electroreduction of CO2 .An obvious improvement of faradaic efficiency(FE) of formate(96.7% at-0.95 V vs.RHE) can be achieved on Cl-Bi,higher than that of Bi(89.4%).Meanwhile,Cl-Bi has the highest formate production rate of 275 μmol h-1cm-2at-0.95 V vs.RHE,which is 1.2 times higher than that of Bi(224 μmol h-1cm-2).In situ characterizations and kinetic analysis reveal that chlorine doping promotes the activation of H2O and supply sufficient protons to promote the protonation of CO2 to OCHO*,which is consistent with theoretical calculation.The study presents an effective strategy for rational design of highly efficient electrocatalysts to promote green chemical production. 展开更多
关键词 CO2electroreduction Heteroatom doping Proton supply effect Reaction kinetics Bismuth-based catalysts
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Reverse size effect on unconfined compressive strength of red-bed rocks using micro-CT technique 认领 引用 被引量：1
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作者 Qinyuan Liang Hengxing Lan +3 位作者 Yu Zhou Bo Li Shijie Liu Han Bao 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第5期3425-3446,共22页
This study integrates unconfined compression tests with high-resolution computed tomography(CT)to analyze the pore heterogeneity,crack propagation,and failure modes of red sandstone specimens with diameters ranging fr... This study integrates unconfined compression tests with high-resolution computed tomography(CT)to analyze the pore heterogeneity,crack propagation,and failure modes of red sandstone specimens with diameters ranging from 10 mm to 100 mm.Key findings include:(1)With increasing specimen size,crack initiation stress(CI),damage stress(CD),and unconfined compressive strength(UCS)initially increase and then decrease;(2)In smaller specimens,stress concentration due to pore heterogeneity leads to splitting failure and lower strength;(3)In medium-sized specimens,friction dominates crack propagation,causing shear failure,while increased fragment rotation enhances energy dissipation,yielding highest strength;(4)In larger specimens,cracks tend to propagate along bedding planes,reducing energy dissipation and then weakening strength.These results provide insights into the reverse size effect on sandstone strength and have implications for engineering applications. 展开更多
关键词 Red sandstone Reverse size effect Unconfined compression test Pore heterogeneity Crack propagation Computed tomography(CT)
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Magnetocaloric effect of Ce(La)In2 alloys near hydrogen condensation point 认领 引用 被引量：1
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作者 Luis M.Moreno-Ramírez Daniel P.Rojas +2 位作者 José I.Espeso Jesús Rodríguez Fernández Victorino Franco 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期249-255,共7页
Gas liquefiers allow efficient transport and storage of gases,key for the development of new energy vectors such as hydrogen fuel.In this sense,magnetic liquefiers based on the magnetocaloric effect are an energy-savi... Gas liquefiers allow efficient transport and storage of gases,key for the development of new energy vectors such as hydrogen fuel.In this sense,magnetic liquefiers based on the magnetocaloric effect are an energy-saving and sustainable alternative to current systems based on the Joule-Thomson expansion.Here,we report the magnetocaloric effect of light rare-earth-based Ce(La)In2 alloys near the hydrogen condensation point.They exhibit a first-order ferromagnetic to paramagnetic phase transition with reduced thermal hysteresis(0.05 K) and moderate criticality compared to their heavy rare-earth-based counterparts.Both isothermal entropy change,and adiabatic entropy change have been indirectly determined from heat capacity measurements.A previously developed method based on lowtemperature truncation of heat capacity data was applied for those calculations,accounting for ~8%underestimation of the maximum values as well as possible misinterpretations of the results in the paramagnetic range.The parent CeIn2 alloy shows an isothermal entropy change of 9.5 J/(kg·K) and an adiabatic temperature change of 2.8 K for a magnetic field change of 5 T.The substitution of Ce by La leads to a slight decrease of the transition temperature in the explored range together with a significant reduction of the magnetocaloric magnitudes:about-1.0 J/(kg·K) and about 0.2 K per atom fraction of La for the isothermal entropy and adiabatic temperature changes for 5 T,respectively. 展开更多
关键词 Ce(La)In2alloys Specific heat measurements Magnetocaloric effect Hydrogen liquefaction Rare earths
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How does plant diversity drive productivity in China’s drylands:Through complementary or mass ratio effects? 认领 引用
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作者 Hao Guo Hong-Hu Meng +4 位作者 Jin-Fei Yin Tong Li Ben-Feng Yin Xiao-Bing Zhou Yuan-Ming Zhang 《Plant Diversity》 SCIE CAS CSCD 2026年第4期766-781,共16页
Dryland biodiversity–productivity relationships remain poorly resolved.Specifically,the environmental conditions governing the shift between complementarity and mass ratio mechanisms remain unclear,limiting the effec... Dryland biodiversity–productivity relationships remain poorly resolved.Specifically,the environmental conditions governing the shift between complementarity and mass ratio mechanisms remain unclear,limiting the effectiveness of restoration and management strategies.To address this gap,the aim of this study was to investigate the geographical patterns of diversity and biomass production in herbaceous communities along a 2100-km precipitation gradient in North China.We studied howα-andβ-diversity affect community-wide productivity using linear mixed-effects models and piecewise structural equation models,along with rolling-window change-point analyses.In arid regions,biomass productivity was primarily driven by interspecificniche complementarity,where higher functional diversity(FD(α))enhanced resource-use efficiency.However,in semi-arid regions,productivity was regulated by the mass ratio effect,specificallythrough the traits of dominant species,including community weighted mean height and specificleaf area,as these species exploited broader resource spectra with increasing water availability.A critical mechanistic shift occurred at a mean annual precipitation(MAP)threshold of~168 mm(95%CI:152–171 mm;p<0.001).Below this threshold,productivity was driven by diversity-mediated complementarity and stress tolerant strategies.Conversely,as MAP surpassed 168 mm,the system transitioned to mass ratio control,coincident with a shift toward competitive strategies.Overall,our study provides empirical evidence to guide dryland management:prioritising the maintenance of functional diversity in arid communities,while emphasising dominant-trait optimisation(plant height and specificleaf area)in semi-arid communities to maximise aboveground biomass. 展开更多
关键词 Biodiversity Aboveground biomass(AGB) Complementarity effect Mass ratio effect CSR strategy Threshold effect
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Synergistic pinning and piezoelectric effects in CNT/BaTiO3network for SiO-based anodes toward ultra-stable lithium batteries 认领 引用
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作者 Feng Sun Anjun Hu +9 位作者 Junmei Han Shenghai Xin Zhihui Ma Youwei Wang Jianbin Li Qi Wan Ruidie Tang Shaofei Wu Xuanhui Qu Ping Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期748-758,I0018,共11页
Silicon dioxide(SiO)is regarded as a promising anode candidate for high-energy-density lithium-ion batteries(LIBs)owing to its superior theoretical specific capacity.However,SiO anodes encounter substantial challenges... Silicon dioxide(SiO)is regarded as a promising anode candidate for high-energy-density lithium-ion batteries(LIBs)owing to its superior theoretical specific capacity.However,SiO anodes encounter substantial challenges,including substantial volume expansion and persistent growth of a thick solid electrolyte interphase(SEI).In this work,a composite conductive network with dual pinning and piezoelectric effects is proposed,which is cleverly designed to improve the electrochemical reaction kinetics of the electrode.Within the proposed network architecture,single-walled carbon nanotubes(CNTs)serve as fast electronic conductors and structural protective layers,forming a three-dimensional(3D)coating network on the surface of SiO particles.Barium titanate(BTO)nanoparticles are anchored at the nodes of the CNT network through the formation of rigid anchor points,dispersing stress throughout the network.Concurrently,mechanical stress induced by electrochemical reactions prompts BTO to generate a local electric field,facilitating Li+transport.Consequently,the developed anode(SiO@PCB)demonstrates remarkable electrochemical performance in LIBs,exhibiting a capacity retention rate of 94%even after 500 cycles at 1 A g-1.Furthermore,a capacity retention of 71.6%is demonstrated by SiO@PCB anode after 1000 cycles at 5 C in sulfide-based all-solid-state LIBs using an NCM83 cathode.This composite conductive network structure provides an effective guidance plan for achieving interface stability and long-term lithium storage of Si-based anodes. 展开更多
关键词 SiO-based anode Pinning effect Piezoelectric effect Composite conductive network Long-cycling life
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Large anomalous Hall and Nernst effect in the breathing kagome ferromagnet NdCrGe3 认领 引用
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作者 Yang Liu Meng Lyu +5 位作者 Junyan Liu Yibo Wang Jinying Yang Binbin Wang Xiyang Li Enke Liu 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期235-242,共8页
The anomalous Hall and Nernst effects provide critical probes for investigating the Berry-curvature-related electronic band characteristics in magnetic materials.In this study,we conducted a comprehensive investigatio... The anomalous Hall and Nernst effects provide critical probes for investigating the Berry-curvature-related electronic band characteristics in magnetic materials.In this study,we conducted a comprehensive investigation into the magnetic,electrical,and thermal transport properties of NdCrGe3single crystals with a Ge-based breathing kagome lattice.This compound undergoes a ferromagnetic transition at 128 K,and magnetic ordering of the Nd sublattice emerges below 100 K.Transport measurements indicate that NdCrGe3manifests large anomalous Hall conductivity withσxyA≈380Ω-1·cm-1at low temperatures and an anomalous Nernst coefficient with|SxyA-max|=0.74µV/K at 100 K.Scaling analysis reveals that NdCrGe3exhibits large intrinsic anomalous Hall conductivity of~260Ω-1·cm-1and falls within the intrinsic regime of the unified model.Furthermore,the anomalous Nernst coefficient breaks down the scaling relationship with magnetization observed in conventional ferromagnets,while the anomalous Nernst conductivity manifests a scaling behavior of T ln T.These results demonstrate that the anomalous transverse transport properties of NdCrGe3are predominantly governed by the intrinsic Berry mechanism. 展开更多
关键词 anomalous Hall effect anomalous Nernst effect Berry curvature breathing kagome lattice NdCrGe3
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