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Spurious Strange Correlators in Symmetry-Protected Topological Phases 认领 引用
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作者 Wei-Liang Gao Jie-Yu Zhang +1 位作者 Zheng-Xin Liu Peng Ye 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第4期160-184,共25页
Strange correlator is a powerful tool widely used in detecting symmetry-protected topological(SPT)phases.However,the result of strange correlator crucially relies on the adoption of the reference state.In this work,we... Strange correlator is a powerful tool widely used in detecting symmetry-protected topological(SPT)phases.However,the result of strange correlator crucially relies on the adoption of the reference state.In this work,we report that an ill-chosen reference state can induce spurious long-range strange correlators in trivial SPT phases,leading to false positives in SPT diagnosis. 展开更多
关键词 spurious strange correlators symmetry protected topological phases false positives spt diagnosis reference state strange correlator
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First Application of Single-Shot Cross-Correlator for Characterizing Nd:glass Petawatt Pulses 认领 引用 被引量：2
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作者 WANG Yong-Zhi OUYANG Xiao-Ping +3 位作者 MA Jin-Gui YUAN Peng XU Guang QIAN Lie-Jia 《Chinese Physics Letters》 SCIE EI CAS CSCD 2013年第2期99-102,共4页
We report the first application of a single-shot cross-correlator for pulse duration and pulse contrast diagnostics in Nd:glass petawatt laser.The information of pulse duration,measured in the single-shot,guides the f... We report the first application of a single-shot cross-correlator for pulse duration and pulse contrast diagnostics in Nd:glass petawatt laser.The information of pulse duration,measured in the single-shot,guides the fine adjustment of the pulse compressor in real time.By integrating several shots of measurements at different time delays together,the petawatt pulse profile is obtained within an overall temporal window of~100 ps,indicating a contrast of~104.The measurements suggest that the additional contrast improvement is necessary for the Nd:glass petawatt laser system,which should be different from conventional Ti:sapphire lasers and is also discussed. 展开更多
关键词 Nd: pulse correlator
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A Comparative Study of f_B within QCD Sum Rules with Two Typical Correlators up to Next-to-Leading Order 认领 引用 被引量：1
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作者 吴兴刚 余耀 +1 位作者 陈古 韩华勇 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第4期635-639,共5页
The B-meson decay constant fB is an important component for studying the B-meson decays, which can be studied through QCD sum rules. We make a detailed discussion on f B from two sum rules up to next-to- leading order... The B-meson decay constant fB is an important component for studying the B-meson decays, which can be studied through QCD sum rules. We make a detailed discussion on f B from two sum rules up to next-to- leading order, i.e. sum rules I and II, which are derived from the conventional correlator and the correlator with chiral currents respectively. It is found that these two sum rules are consistent with each other. The sum rules H involves less non-perturbative condensates as that of sum rules I, and in principle, it can be more accurate if we know the dimensionfour gluon condensate well. It is found that fB decreases with the increment of mb, and to compare with the Belle experimental data on fB, both sum rules I and H prefer smaller pole b-quark mass, mb= 4.68 ± 0.07 GeV. By varying all the input parameters within their reasonable regions and by adding all the uncertainties in quadrature, we obtain fB=172-25^＋23 MeV for sum rules I and fB =214-34^26 MeV for sum rules П. 展开更多
关键词 QCD sum rules decay constant correlator
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Noise Analysis of Analog Correlator  认领 引用
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作者 涂春江 刘伯安 陈弘毅 《Journal of Semiconductors》 CAS 北大核心 2005年第3期480-486,共7页
A noise model for the analog correlator used in the ultra wideband receivers is proposed due to lack of simulation capability on noise performance of the correlator in current EDA tools.The analog correlator circuit i... A noise model for the analog correlator used in the ultra wideband receivers is proposed due to lack of simulation capability on noise performance of the correlator in current EDA tools.The analog correlator circuit is divided into several parts to calculate the equivalent noise sources respectively.The ideal impulse generators,instead of the noise sources,are then applied to obtain the time varying transfer functions.Fourier transforms are carried out to explore the relationship between the noise input and output in frequency domain for each part.Then the symmetrical noise sources are grouped together and the periodicity of the circuit is utilized to further simplify the model.This model can be used to evaluate noise performance of the correlator. 展开更多
关键词 noise correlator analog
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Simple optical decryption based on a modified joint transform correlator technique 认领 引用
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作者 王怀彬 王天佐 袁晓聪 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第2期203-205,共3页
A new encryption/decryption system for optical information security is proposed in this paper. We used an iterative Fourier transform algorithm to optimize the encrypted hologram as well as the decryption key as phase... A new encryption/decryption system for optical information security is proposed in this paper. We used an iterative Fourier transform algorithm to optimize the encrypted hologram as well as the decryption key as phase-only elements. The optical decryption was implemented by superimposing the encrypted hologram and the decryyption key in a simple optical setup. Numerical simulation and optical experiment have confirmed the proposed technique as a simple and easy implementation for optical decryption, demonstrating potential applications in optical information security verification. 展开更多
关键词 computer generated holograms correlator encryption/decryption
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Similar Early Growth of Out-of-time-ordered Correlators in Quantum Chaotic and Integrable Ising Chains 认领 引用 被引量：1
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作者 Hua Yan Jiao-Zi Wang Wen-Ge Wang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2019年第11期1359-1362,共4页
Previous studies show that, in quantum chaotic and integrable systems, the so-called out-of-time-ordered correlator(OTOC) generically behaves differently at long times, while, it may show similar early growth in one-b... Previous studies show that, in quantum chaotic and integrable systems, the so-called out-of-time-ordered correlator(OTOC) generically behaves differently at long times, while, it may show similar early growth in one-body systems. In this paper, by means of numerical simulations, it is shown that OTOC has similar early growth in two quantum many-body systems, one integrable and one chaotic. 展开更多
关键词 quantum chaotic system quantum integrable system out-of-time-ordered correlator
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Diagnosing quantum crosstalk in superconducting quantum chips by using out-of-time-order correlators 认领 引用
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作者 Yujia Zhang Yu Zhang +2 位作者 Shaoxiong Li Wen Zheng Yang Yu 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第11期207-211,共5页
Performance of a scalable quantum processor critically relies on minimizing crosstalk and unwanted interactions within the system,as it is vital for parallel controlled operations on qubits.We present a protocol not o... Performance of a scalable quantum processor critically relies on minimizing crosstalk and unwanted interactions within the system,as it is vital for parallel controlled operations on qubits.We present a protocol not only to provide information about residual coupling but also to effectively discriminate it from the influence of classical crosstalk.Our approach utilizes out-of-time-order correlators(OTOCs)as a signal of quantum crosstalk,making it applicable to various coupling forms and scalable architectures.To demonstrate the effectiveness of our protocol,we provide a theoretical analysis and simulate its implementation in coupled superconducting qubits. 展开更多
关键词 superconducting qubit crosstalk out-of-time-order correlator(OTOC)
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Characterizing entanglement in non-Hermitian chaotic systems via out-of-time ordered correlators 认领 引用
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作者 Kai-Qian Huang Wei-Lin Li +1 位作者 Wen-Lei Zhao Zhi Li 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第9期180-184,共5页
We investigate the quantum entanglement in a non-Hermitian kicking system.In the Hermitian case,the out-of-time ordered correlators(OTOCs)exhibit the unbounded power-law increase with time.Correspondingly,the linear e... We investigate the quantum entanglement in a non-Hermitian kicking system.In the Hermitian case,the out-of-time ordered correlators(OTOCs)exhibit the unbounded power-law increase with time.Correspondingly,the linear entropy,which is a common measurement of entanglement,rapidly increases from zero to almost unity,indicating the formation of quantum entanglement.For strong enough non-Hermitian driving,both the OTOCs and linear entropy rapidly saturate as time evolves.Interestingly,with the increase of non-Hermitian kicking strength,the long-time averaged value of both OTOCs and linear entropy has the same transition point where they exhibit the sharp decrease from a plateau,demonstrating the disentanglment.We reveal the mechanism of disentanglement with the extension of Floquet theory to non-Hermitian systems. 展开更多
关键词 out-of-time ordered correlators quantum entanglement non-Hermiticity
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Out-of-time-order correlators in the one-dimensional XY model 认领 引用
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作者 Jia-Hui Bao Cheng-Yong Zhang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2020年第8期69-78,共10页
We study the behavior of information spreading in the XY model, using out-of-time-order correlators(OTOCs). The effects of anisotropic parameter γ and external magnetic field λon OTOCs are studied in detail within t... We study the behavior of information spreading in the XY model, using out-of-time-order correlators(OTOCs). The effects of anisotropic parameter γ and external magnetic field λon OTOCs are studied in detail within thermodynamical limits. The universal form which characterizes the wavefront of information spreading still holds in the XY model. The butterfly speed vBdepends on(γ, λ). At a fixed location, the early-time evolution behavior of OTOCs agrees with the results of the Hausdorff–Baker–Campbell expansion. For long-time evolution,OTOCs with local operators decay as for power law t^-1, but those with nonlocal operators show different and nontrivial power law behaviors. We also observe temperature dependence for OTOCs when(γ=0, λ=1). At low temperature, the OTOCs with nonlocal operators show divergence over time. 展开更多
关键词 out-of-time-order correlators information spreading integrable model
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Design of 1.5 bit quantization correlator in satellite navigation software receiver 认领 引用
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作者 Hongwei Zhou Tian Jin Fangyao Lü 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2016年第2期449-456,共8页
Currently, 1 bit or 2 bit signal quantization is widely used in satellite navigation software receivers. The bit-wise parallel algorithm has been proposed for 1 bit and 2 bit signal quantization, which performs correl... Currently, 1 bit or 2 bit signal quantization is widely used in satellite navigation software receivers. The bit-wise parallel algorithm has been proposed for 1 bit and 2 bit signal quantization, which performs correlation with high efficiency. In order to improve the performance of the correlator, this paper proposes a new 1.5 bit quantization method. Theoretical analyses are made from the aspects of complexity and quantization loss, and performance comparison between 1.5 bit quantization correlator and traditional correlators is discussed. The results show that the 1.5 bit quantization algorithm can save about 30 percent complexity under similar quantization loss, reduce more than 0.5 dB signal noise ratio（SNR） loss under similar complexity. It shows great performance improvement for correlators of satellite navigation software receivers. 展开更多
关键词 correlator bit-wise 1.5 bit quantization satellite navigation
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Wideband Demodulator Based on Five-Port Correlator for Channel Sounding Applications 认领 引用
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作者 Imen Sfar Lotfi Osman Ali Gharsallah 《Journal of Electromagnetic Analysis and Applications》 2013年第2期79-84,共6页
We present in this paper a wideband RF demodulator using a five-port correlator and a power detector for channel sounding applications. The demodulator has been fabricated using microstrip components. The correlator r... We present in this paper a wideband RF demodulator using a five-port correlator and a power detector for channel sounding applications. The demodulator has been fabricated using microstrip components. The correlator receives from the five-port qualities that allow it to be low-cost and less sensitive to the phase and amplitude imbalances. A calibration procedure is proposed to find the complex envelope of the RF signal applied at the input of the five-port correlator. Simulation with Advanced Design System software and measurement results have been conducted to demonstrate its capabilities as a RF signal demodulator operating in a wideband around 2.4 GHz frequency. 展开更多
关键词 Calibration Procedure Channel Sounder Diode Power Detector Five-Port Correlator
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Design of a Modified Cassegrain System Used in Joint Transform Correlator 认领 引用
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作者 MA Yongli WANG Wensheng 《Semiconductor Photonics and Technology》 2010年第2期68-72,共5页
In order to detect and recognize infrared target with joint transform correlator,a modified Cassegrain optical system is designed.The main advantages of the system are large field-of-view,infrared dual-band common opt... In order to detect and recognize infrared target with joint transform correlator,a modified Cassegrain optical system is designed.The main advantages of the system are large field-of-view,infrared dual-band common optical path and compact structure.In the modified Cassegrain optical system,the working wavelengths are 3.7~4.8μm and 8~12μm,the field-of-view is 4° and the aperture is 240mm.The paraboloidal primary mirror and hyperboloidal secondary mirror are all replaced by spherical surfaces.So the problems of high machining accuracy and alignment become much easier.In order to balance the aberrations,three compensating lenses are used in the system.The total length of the system is 183mm,and the ratio of the total length to focal length is 0.68.Moreover,the system has a good performance of athermalization between negative 40℃ and positive 60℃.The design results of the system show that the MTF value of each field is greater than 0.72 when the cut-off frequency is 11lp/mm.Due to the excellent image quality of the modified optical system,the ability of Joint transform correlator(JTC)applied in target tracking and identification has been improved for further. 展开更多
关键词 optical design joint transform correlator infrared dual-band aspherical surface Cassegrain optical system
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Image Encryption Based on a 1-D Joint Transform Correlator 认领 引用
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作者 XULin LIAimin 《Semiconductor Photonics and Technology》 1999年第1期58-60,64,共3页
A method for image encryption using a 1-D joint transform correlator is described. By use of line functions, a 2-D object is encrypted first in one direction, then in the perpendicular direction. The principle of the ... A method for image encryption using a 1-D joint transform correlator is described. By use of line functions, a 2-D object is encrypted first in one direction, then in the perpendicular direction. The principle of the method and experimental results are given. 展开更多
关键词 Correlator Cryptography Optical Information Processing
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Multiple Targets Recognition for Highly-Compressed Color Images in a Joint Transform Correlator 认领 引用
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作者 Abdallah K. Cherri Alshahd S. Nazar 《Optics and Photonics Journal》 2022年第5期107-127,共21页
In this paper, we are proposing a compression-based multiple color target detection for practical near real-time optical pattern recognition applications. By reducing the size of the color images to its utmost compres... In this paper, we are proposing a compression-based multiple color target detection for practical near real-time optical pattern recognition applications. By reducing the size of the color images to its utmost compression, the speed and the storage of the system are greatly increased. We have used the powerful Fringe-adjusted joint transform correlation technique to successfully detect compression-based multiple targets in colored images. The colored image is decomposed into three fundamental color components images (Red, Green, Blue) and they are separately processed by three-channel correlators. The outputs of the three channels are then combined into a single correlation output. To eliminate the false alarms and zero-order terms due to multiple desired and undesired targets in a scene, we have used the reference shifted phase-encoded and the reference phase-encoded techniques. The performance of the proposed compression-based technique is assessed through many computer simulation tests for images polluted by strong additive Gaussian and Salt & Pepper noises as well as reference occluded images. The robustness of the scheme is demonstrated for severely compressed images (up to 94% ratio), strong noise densities (up to 0.5), and large reference occlusion images (up to 75%). 展开更多
关键词 Image Compression JPEG Image Format Multiple Targets Detection Fringe-Adjusted Joint Transform Correlation Random-Phase Mask
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Soil desiccation cracking triggered by surface defects:Insight and mechanism based on strain/displacement analysis using DIC 认领 引用 被引量：2
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作者 Tao Wang Chao-Sheng Tang +3 位作者 Luan Lin Zhixiong Zeng Qing Cheng Zhengtao Shen 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第1期651-661,共11页
Soil desiccation cracking is a prevalent natural phenomenon that poses significant geotechnical and geoenvironmental challenges.Cracks typically initiate at surface defects such as air bubbles,large aggregates,tiny pi... Soil desiccation cracking is a prevalent natural phenomenon that poses significant geotechnical and geoenvironmental challenges.Cracks typically initiate at surface defects such as air bubbles,large aggregates,tiny pits,or uneven surfaces,where localized stress concentrations are readily induced.This study conducted a series of laboratory desiccation tests on slurry samples to investigate the initiation and propagation of desiccation cracks in the presence of varying types and quantities of surface defects.Digital image correlation(DIC)technology was employed to monitor the strain and displacement fields on the soil surface during the desiccation process.The results reveal that strain and displacement data derived from DIC can precisely predict the initiation sites and propagation directions of desiccation cracks.In samples with internal defects,cracks predominantly propagate through the defect,whereas external defects tend to initiate cracks along their edges.In samples with multiple defects,Y-shaped crack patterns generally form initially,followed by T-shaped and straight cracks,driven by the evolving stress field.The dynamic interplay between crack formation and tensile stress redistribution governs the initiation and propagation of desiccation cracks. 展开更多
关键词 Desiccation cracking Digital image correlation(DIC)technology Defect Strain/displacement field Stress concentration
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Dissecting mitogenomic conflictto illuminate angiosperm deep phylogeny:Sequence and architectural evidence 认领 引用 被引量：1
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作者 Liyun Nie Jie Wang +9 位作者 Lei Huang Jiali Kong Bao Nie Luke R.Tembrock Shanshan Dong Ravi Tiwari Hui Wang Shenglong Kan Xinhui Zou Zhiqiang Wu 《Plant Diversity》 SCIE CAS CSCD 2026年第1期41-58,共18页
Deep relationships in the angiosperm tree of life remain highly controversial.To address this,we first assembled the complete mitochondrial genomes for Ceratophyllum demersum and Chloranthus sessilifolius,confirming a... Deep relationships in the angiosperm tree of life remain highly controversial.To address this,we first assembled the complete mitochondrial genomes for Ceratophyllum demersum and Chloranthus sessilifolius,confirming a well-supported sister relationship that starkly conflicts with nuclear and plastid data.To dissect this classic cyto-nuclear conflict,we developed the‘PhyloForensics’framework,a novel diagnostic approach to systematically identify sources of phylogenetic instability.This framework revealed that signal heterogeneity(topological entropy variance)and information content(the proportion of informative sites)are the primary drivers of gene-tree conflict.Empirically validating this,we show that removing a small subset of“loudly conflicted”genes resolves deep-level incongruence,yielding a single,highly-supported topology previously obscured by noise.Finally,complementing this sequence-based resolution,we demonstrate that mitogenome architecture provides powerful phylogenetic signals,revealing predictable,mitogenome-wide evolutionary patterns,such as a significant negative correlation between branch length and both GC content and RNA editing sites.By integrating a validated conflict-resolution framework with architectural genomics,our study provides a comprehensive strategy for navigating the complexities of deep evolutionary histories. 展开更多
关键词 Angiosperm phylogeny Ceratophyllales Chloranthales Evolutionary correlation Mitochondrial genomes
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Progress in VLBI observations with the Haoping 40 m radio telescope 认领 引用
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作者 De Wu Jintao Luo +10 位作者 Yue Hu Wu Jiang Zhen Yan Jia Liu Rurong Chen Lang Cui Yuping Gao Wen Chen Pingli Wang Yifeng Li Zurong Zhou 《Astronomical Techniques and Instruments》 CSCD 2026年第1期82-91,共10页
The Haoping 40 m radio telescope at the National Time Service Center,Chinese Academy of Sciences was built in 2014 and is primarily used to observe navigation satellites and pulsars.Since the first successful very lon... The Haoping 40 m radio telescope at the National Time Service Center,Chinese Academy of Sciences was built in 2014 and is primarily used to observe navigation satellites and pulsars.Since the first successful very long baseline interferometry(VLBI)observation of L-band radio source fringes in 2022,ten observations have been made so far.The stations involved in the observations include the Haoping 40 m radio telescope(Haoping),the Tianma 65 m radio telescope(Tianma),the Nanshan 26 m radio telescope(Urumqi),the Guizhou 500 m radio telescope(FAST),the Jilin 13 m radio telescope(Jilin),the Effelsberg 100 m radio telescope(Effelsberg),the Onsala 25 m radio telescope(Onsala),and the Chiang Mai 40 m radio telescope(Chiang Mai).This paper presents details on the specifications of the Haoping 40 m radio telescope,as well as the design of the VLBI experiment,the observation process,and the data processing.We also discuss the analysis of the fringe results involving the Haoping 40 m radio telescope,using Distributed FX Correlator to obtain excellent results.We confirm that the telescope is capable of participating in VLBI observations and performing specific data processing tasks.It can therefore play a greater role in future VLBI observations. 展开更多
关键词 VLBI Radio Telescope Distributed FX Correlator Fringe fitting Pulsar
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Material Compression Tests on Rigid Insulation Tiles at Elevated Temperatures with Digital Image Correlation 认领 引用 被引量：1
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作者 Datao Li Xiahui Wei +3 位作者 Yingrong Gao Jinsong Jiang Binhua Wang Wei Xia 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2026年第6期782-790,共9页
The mechanical properties of rigid insulation tile(RIT)materials at elevated temperatures(700~1000℃)were studied through compression tests and the digital image correlation(DIC)method.To reduce measurement error in a... The mechanical properties of rigid insulation tile(RIT)materials at elevated temperatures(700~1000℃)were studied through compression tests and the digital image correlation(DIC)method.To reduce measurement error in a thermal environment,an image gradient zero-mean normalized cross-correlation algorithm(ZNCCGI)was added to the DIC algorithm.The DIC algorithm was verified via RIT material mechanical tests at room temperature.Furthermore,the compressive stress–strain curves and Young's modulus of RIT materials at elevated temperatures were obtained.The experimental results show that the Young's modulus of RIT materials significantly increased at 800℃.Moreover,the compressive yield strength was significantly improved at 800℃,which resulted in a random distribution of ceramic fibers and viscous flow deformation at elevated temperatures.Scanning electron microscope analysis demonstrated that the compressive damage occurs due to the breaking of ceramic fibers. 展开更多
关键词 Rigid insulation tile(RIT) Digital image correlation(DIC) Elevated temperature Compressive yield strength Young's modulus
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Ab initio density functional theory approach to warm dense hydrogen:From density response to electronic correlations 认领 引用 被引量：1
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作者 Zhandos A.Moldabekov Xuecheng Shao +5 位作者 Hannah M.Bellenbaum Cheng Ma Wenhui Mi Sebastian Schwalbe Jan Vorberger Tobias Dornheim 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第2期14-20,共7页
Understanding the properties of warm dense hydrogen is of key importance for the modeling of compact astrophysical objects and to understand and further optimize inertial confinement fusion applications.The workhorse ... Understanding the properties of warm dense hydrogen is of key importance for the modeling of compact astrophysical objects and to understand and further optimize inertial confinement fusion applications.The workhorse of warm dense matter theory is thermal density functional theory(DFT),which,however,suffers from two limitations:(i)its accuracy can depend on the utilized exchange-correlation functional,which has to be approximated,and(ii)it is generally limited to single-electron properties such as the density distribution.Here,we present a new ansatz combining time-dependent DFT results for the dynamic structure factor See(q,ω)with static DFT results for the density response.This allows us to estimate the electron-electron static structure factor See(q)of warm dense hydrogen with high accuracy over a broad range of densities and temperatures.In addition to its value for the study of warm dense matter,our work opens up new avenues for the future study of electronic correlations exclusively within the framework of DFT for a host of applications. 展开更多
关键词 thermal density functional theory dft whichhoweversuffers understanding properties warm dense hydrogen thermal density functional theory understand further optimize inertial confinement fusion applicationsthe warm dense matter theory electronic correlations warm dense hydrogen density functional theory
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Quantitative Defect-Property Correlations in Ti3C2Tx MXenes via Precursor‑Controlled Defect Engineering 认领 引用
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作者 Tufail Hassan Doyeon Lee +13 位作者 Shabbir Madad Naqvi Myungjae Kim Jung‑Min Oh Sang Woon Park Aamir Iqbal Soo Yeong Cho Zhiwang Hao Noushad Hussain Zubair Khalid Shakir Zaman Xiangmeng Kong Ki‑Min Roh Hanjung Kwon Chong Min Koo 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第8期235-251,共17页
Defect engineering holds great promise for tailoring the multifunctional properties of MXenes.However,quantitative correlations between defect and material performance remain largely unexplored due to the lack of a re... Defect engineering holds great promise for tailoring the multifunctional properties of MXenes.However,quantitative correlations between defect and material performance remain largely unexplored due to the lack of a reliable strategy to precisely control defect densities.Here,we demonstrate that the defect density of Ti3C2Tx MXenes—including titanium and carbon vacancies,substitutional oxygen defects,and the associated lattice strain—is precisely controlled by adjusting carbon stoichiometry during TiC precursor synthesis and aluminum content during Ti3AlC2 MAX formation.The defect densities propagate from precursors to final MXenes,enabling the fabrication of a series of Ti3C2Tx MXenes with systematically controlled defect densities.This allows a quantitative correlation between defect density and multifunctional properties including electrical and thermal conductivities,infrared emissivity,electromagnetic shielding effectiveness,Joule heating performance,and oxidation stability.The defect-minimized Ti3C2Tx MXene exhibits outstanding performance,with an electrical conductivity of 26,000 S cm−1,thermal conductivity of 57 W m−1 K−1,electromagnetic shielding effectiveness of 90.5 dB at 10μm,Joule heating performance of 263℃ at 1.5 V,ultralow infrared emissivity of 0.05,and superior oxidation resistance(activation energy of 72 kJ mol−1).Furthermore,this work establishes a comprehensive quantitative framework linking defect structure to multifunctional performance and stability. 展开更多
关键词 MXenes Defect engineering Vacancies and substitutions defects Defect-property correlation Oxidation resistance
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