Pub Date : 2024-07-01DOI: 10.1088/0256-307x/41/7/077302
Bei Cao, Chongze Han, Xiang Hao, Chen Wang, Jincheng Lu
We present a study on inelastic thermoelectric devices, wherein charge currents and electronic and phononic heat currents are intricately interconnected. The employment of double quantum dots in conjunction with a phonon reservoir positions them as promising candidates for quantum thermoelectric diodes and transistors. We illustrate that quantum coherence yields significant charge and Seebeck rectification effects. It is worth noting that, while the thermal transistor effect is observable in the linear response regime, especially when phonon-assisted inelastic processes dominate the transport, quantum coherence does not enhance thermal amplification. Our work may provide valuable insights for the optimization of inelastic thermoelectric devices.
{"title":"Impact of Quantum Coherence on Inelastic Thermoelectric Devices: From Diode to Transistor","authors":"Bei Cao, Chongze Han, Xiang Hao, Chen Wang, Jincheng Lu","doi":"10.1088/0256-307x/41/7/077302","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077302","url":null,"abstract":"We present a study on inelastic thermoelectric devices, wherein charge currents and electronic and phononic heat currents are intricately interconnected. The employment of double quantum dots in conjunction with a phonon reservoir positions them as promising candidates for quantum thermoelectric diodes and transistors. We illustrate that quantum coherence yields significant charge and Seebeck rectification effects. It is worth noting that, while the thermal transistor effect is observable in the linear response regime, especially when phonon-assisted inelastic processes dominate the transport, quantum coherence does not enhance thermal amplification. Our work may provide valuable insights for the optimization of inelastic thermoelectric devices.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/0256-307x/41/7/077102
Xiege Huang, Jialiang Li, Haoqin Ma, Changlong Li, Tianle Liu, Bo Duan, Pengcheng Zhai, Guodong Li
Band convergence is considered to be a strategy with clear benefits for thermoelectric performance, generally favoring the co-optimization of conductivity and Seebeck coefficients, and the conventional means include elemental filling to regulate the band. However, the influence of the most electronegative fluorine on the CoSb3 band remains unclear. We carry out density-functional-theory calculations and show that the valence band maximum gradually shifts downward with the increase of fluorine filling, lastly the valence band maximum converges to the highly degenerated secondary valence bands in fluorine-filled skutterudites. The effective degeneracy near the secondary valence band promotes more valleys to participate in electric transport, leading to a carrier mobility of more than the threefold and nearly twofold effective mass for F0.1Co4Sb12 compared to Co4Sb12. This work provides a new and promising route to boost the thermoelectric properties of p-type skutterudites.
{"title":"Valence Bands Convergence in p-Type CoSb3 through Electronegative Fluorine Filling","authors":"Xiege Huang, Jialiang Li, Haoqin Ma, Changlong Li, Tianle Liu, Bo Duan, Pengcheng Zhai, Guodong Li","doi":"10.1088/0256-307x/41/7/077102","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077102","url":null,"abstract":"Band convergence is considered to be a strategy with clear benefits for thermoelectric performance, generally favoring the co-optimization of conductivity and Seebeck coefficients, and the conventional means include elemental filling to regulate the band. However, the influence of the most electronegative fluorine on the CoSb<sub>3</sub> band remains unclear. We carry out density-functional-theory calculations and show that the valence band maximum gradually shifts downward with the increase of fluorine filling, lastly the valence band maximum converges to the highly degenerated secondary valence bands in fluorine-filled skutterudites. The effective degeneracy near the secondary valence band promotes more valleys to participate in electric transport, leading to a carrier mobility of more than the threefold and nearly twofold effective mass for F<sub>0.1</sub>Co<sub>4</sub>Sb<sub>12</sub> compared to Co<sub>4</sub>Sb<sub>12</sub>. This work provides a new and promising route to boost the thermoelectric properties of p-type skutterudites.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High-order quantum coherence reveals the statistical correlation of quantum particles. Manipulation of quantum coherence of light in the temporal domain enables the production of the single-photon source, which has become one of the most important quantum resources. High-order quantum coherence in the spatial domain plays a crucial role in a variety of applications, such as quantum imaging, holography, and microscopy. However, the active control of second-order spatial quantum coherence remains a challenging task. Here we predict theoretically and demonstrate experimentally the first active manipulation of second-order spatial quantum coherence, which exhibits the capability of switching between bunching and anti-bunching, by mapping the entanglement of spatially structured photons. We also show that signal processing based on quantum coherence exhibits robust resistance to intensity disturbance. Our findings not only enhance existing applications but also pave the way for broader utilization of higher-order spatial quantum coherence.
{"title":"Manipulating the Spatial Structure of Second-Order Quantum Coherence Using Entangled Photons","authors":"Shuang-Yin Huang, 双印 黄, Jing Gao, 菁 高, Zhi-Cheng Ren, 志成 任, Zi-Mo Cheng, 子默 程, Wen-Zheng Zhu, 文正 朱, Shu-Tian Xue, 舒天 薛, Yan-Chao Lou, 严超 娄, Zhi-Feng Liu, 志峰 刘, Chao Chen, 超 陈, Fei Zhu, 飞 朱, Li-Ping Yang, 立平 杨, Xi-Lin Wang, 喜林 汪, Hui-Tian Wang and 慧田 王","doi":"10.1088/0256-307x/41/7/074205","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/074205","url":null,"abstract":"High-order quantum coherence reveals the statistical correlation of quantum particles. Manipulation of quantum coherence of light in the temporal domain enables the production of the single-photon source, which has become one of the most important quantum resources. High-order quantum coherence in the spatial domain plays a crucial role in a variety of applications, such as quantum imaging, holography, and microscopy. However, the active control of second-order spatial quantum coherence remains a challenging task. Here we predict theoretically and demonstrate experimentally the first active manipulation of second-order spatial quantum coherence, which exhibits the capability of switching between bunching and anti-bunching, by mapping the entanglement of spatially structured photons. We also show that signal processing based on quantum coherence exhibits robust resistance to intensity disturbance. Our findings not only enhance existing applications but also pave the way for broader utilization of higher-order spatial quantum coherence.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/0256-307x/41/7/070302
Yu Zhang, 钰 张, Chuiping Yang, 垂平 杨, Qiping Su, 奇平 苏, Yihao Kang, 逸豪 康, Wen Zheng, 文 郑, Shaoxiong Li, 邵雄 李, Yang Yu and 扬 于
We propose a simple quantum voting machine using microwave photon qubit encoding, based on a setup comprising multiple microwave cavities and a coupled superconducting flux qutrit. This approach primarily relies on a multi-control single-target quantum phase gate. The scheme offers operational simplicity, requiring only a single step, while ensuring verifiability through the measurement of a single qubit phase information to obtain the voting results. It provides voter anonymity, as the voting outcome is solely tied to the total number of affirmative votes. Our quantum voting machine also has scalability in terms of the number of voters. Additionally, the physical realization of the quantum voting machine is general and not limited to circuit quantum electrodynamics. Quantum voting machine can be implemented as long as the multi-control single-phase quantum phase gate is realized in other physical systems. Numerical simulations indicate the feasibility of this quantum voting machine within the current quantum technology.
{"title":"Quantum Voting Machine Encoded with Microwave Photons","authors":"Yu Zhang, 钰 张, Chuiping Yang, 垂平 杨, Qiping Su, 奇平 苏, Yihao Kang, 逸豪 康, Wen Zheng, 文 郑, Shaoxiong Li, 邵雄 李, Yang Yu and 扬 于","doi":"10.1088/0256-307x/41/7/070302","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/070302","url":null,"abstract":"We propose a simple quantum voting machine using microwave photon qubit encoding, based on a setup comprising multiple microwave cavities and a coupled superconducting flux qutrit. This approach primarily relies on a multi-control single-target quantum phase gate. The scheme offers operational simplicity, requiring only a single step, while ensuring verifiability through the measurement of a single qubit phase information to obtain the voting results. It provides voter anonymity, as the voting outcome is solely tied to the total number of affirmative votes. Our quantum voting machine also has scalability in terms of the number of voters. Additionally, the physical realization of the quantum voting machine is general and not limited to circuit quantum electrodynamics. Quantum voting machine can be implemented as long as the multi-control single-phase quantum phase gate is realized in other physical systems. Numerical simulations indicate the feasibility of this quantum voting machine within the current quantum technology.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141547978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/0256-307x/41/7/077301
Sanyi You, Jiaqi An and Zhenhua Qiao
The reliance on spin-orbit coupling or strong magnetic fields has always posed significant challenges for the mass production and even laboratory realization of most topological materials. Valley-based topological zero-line modes have attracted widespread attention due to their substantial advantage of being initially realizable with just an external electric field. However, the uncontrollable nature of electrode alignment and precise fabrication has greatly hindered the advancement in this field. By utilizing minimally twisted bilayer graphene and introducing exchange fields from magnetic substrates, we successfully realize a spin-resolved, electrode-free topological zero-line mode. Further integration of electrodes that do not require alignment considerations significantly enhances the tunability of the system’s band structure. Our approach offers a promising new support for the dazzling potential of topological zero-line mode in the realm of low-energy-consumption electronics.
{"title":"Spin Resolved Zero-Line Modes in Minimally Twisted Bilayer Graphene from Exchange Field and Gate Voltage","authors":"Sanyi You, Jiaqi An and Zhenhua Qiao","doi":"10.1088/0256-307x/41/7/077301","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077301","url":null,"abstract":"The reliance on spin-orbit coupling or strong magnetic fields has always posed significant challenges for the mass production and even laboratory realization of most topological materials. Valley-based topological zero-line modes have attracted widespread attention due to their substantial advantage of being initially realizable with just an external electric field. However, the uncontrollable nature of electrode alignment and precise fabrication has greatly hindered the advancement in this field. By utilizing minimally twisted bilayer graphene and introducing exchange fields from magnetic substrates, we successfully realize a spin-resolved, electrode-free topological zero-line mode. Further integration of electrodes that do not require alignment considerations significantly enhances the tunability of the system’s band structure. Our approach offers a promising new support for the dazzling potential of topological zero-line mode in the realm of low-energy-consumption electronics.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141588281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/0256-307x/41/7/077402
Meng Wang, 猛 王, Hai-Hu Wen, 海虎 闻, Tao Wu, 涛 吴, Dao-Xin Yao, 道新 姚, Tao Xiang and 涛 向
This review provides a comprehensive overview of current research on the structural, electronic, and magnetic characteristics of the recently discovered high-temperature superconductor La3Ni2O7 under high pressures. We present the experimental results for synthesizing and characterizing this material, derived from measurements of transport, thermodynamics, and various spectroscopic techniques, and discuss their physical implications. We also explore theoretical models proposed to describe the electronic structures and superconducting pairing symmetry in La3Ni2O7, highlighting the intricate interplay between electronic correlations and magnetic interactions. Despite these advances, challenges remain in growing high-quality samples free of extrinsic phases and oxygen deficiencies and in developing reliable measurement tools for determining diamagnetism and other physical quantities under high pressures. Further investigations in these areas are essential to deepening our understanding of the physical properties of La3Ni2O7 and unlocking its superconducting pairing mechanism.
{"title":"Normal and Superconducting Properties of La3Ni2O7","authors":"Meng Wang, 猛 王, Hai-Hu Wen, 海虎 闻, Tao Wu, 涛 吴, Dao-Xin Yao, 道新 姚, Tao Xiang and 涛 向","doi":"10.1088/0256-307x/41/7/077402","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077402","url":null,"abstract":"This review provides a comprehensive overview of current research on the structural, electronic, and magnetic characteristics of the recently discovered high-temperature superconductor La3Ni2O7 under high pressures. We present the experimental results for synthesizing and characterizing this material, derived from measurements of transport, thermodynamics, and various spectroscopic techniques, and discuss their physical implications. We also explore theoretical models proposed to describe the electronic structures and superconducting pairing symmetry in La3Ni2O7, highlighting the intricate interplay between electronic correlations and magnetic interactions. Despite these advances, challenges remain in growing high-quality samples free of extrinsic phases and oxygen deficiencies and in developing reliable measurement tools for determining diamagnetism and other physical quantities under high pressures. Further investigations in these areas are essential to deepening our understanding of the physical properties of La3Ni2O7 and unlocking its superconducting pairing mechanism.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The rattling mode, an anharmonic vibrational phonon, is widely recognized as a critical factor in the emergence of superconductivity in caged materials. Here, we present a counterexample in a filled-skutterudite superconductor BaxIr4Sb12 (x = 0.8, 0.9, 1.0), synthesized via a high-pressure route. Transport measurements down to liquid 3He temperatures reveal a transition temperature (Tc) of 1.2 K and an upper critical field (Hc2) of 1.3 T. Unlike other superconductors with caged structures, the BaxIr4X12 (X = P, As, Sb) family exhibits a monotonic decreasing Tc with the enhancement of the rattling mode, as indicated by fitting the Bloch–Grüneisen formula. Theoretical analysis suggests that electron doping from Ba transforms the direct bandgap IrSb3 into a metal, with the Fermi surface dominated by the hybridization of Ir 5d and Sb 5p orbitals. Our findings of decoupled rattling modes and superconductivity distinguish the BaxIr4Sb12 family from other caged superconductors, warranting further exploration into the underlying mechanism.
嘎嘎模式是一种非谐振声子，被广泛认为是笼型材料出现超导电性的关键因素。在这里，我们提出了一个反例，即通过高压途径合成的填充砚石超导体 BaxIr4Sb12（x = 0.8、0.9、1.0）。与其他具有笼状结构的超导体不同，BaxIr4X12（X = P、As、Sb）系列表现出随着响振模式的增强而单调递减的 Tc，这一点可以通过布洛赫-格吕尼森公式拟合得到。理论分析表明，来自 Ba 的电子掺杂将直接带隙 IrSb3 转变为金属，费米面由 Ir 5d 和 Sb 5p 轨道杂化主导。我们发现的解耦响声模式和超导性使 BaxIr4Sb12 系列有别于其他笼型超导体，值得进一步探索其基本机制。
{"title":"Decoupling of Rattling Mode and Superconductivity in Filled-Skutterudite BaxIr4Sb12","authors":"Hui Liu, 辉 刘, Tongxu Yu, 同旭 于, Zhihua Zhang, 志华 张, Tianping Ying and 天平 应","doi":"10.1088/0256-307x/41/7/077401","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077401","url":null,"abstract":"The rattling mode, an anharmonic vibrational phonon, is widely recognized as a critical factor in the emergence of superconductivity in caged materials. Here, we present a counterexample in a filled-skutterudite superconductor BaxIr4Sb12 (x = 0.8, 0.9, 1.0), synthesized via a high-pressure route. Transport measurements down to liquid 3He temperatures reveal a transition temperature (Tc) of 1.2 K and an upper critical field (Hc2) of 1.3 T. Unlike other superconductors with caged structures, the BaxIr4X12 (X = P, As, Sb) family exhibits a monotonic decreasing Tc with the enhancement of the rattling mode, as indicated by fitting the Bloch–Grüneisen formula. Theoretical analysis suggests that electron doping from Ba transforms the direct bandgap IrSb3 into a metal, with the Fermi surface dominated by the hybridization of Ir 5d and Sb 5p orbitals. Our findings of decoupled rattling modes and superconductivity distinguish the BaxIr4Sb12 family from other caged superconductors, warranting further exploration into the underlying mechanism.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/0256-307x/41/7/070501
Yu Zhong, 毓 钟, Houria Triki, Qin Zhou and 勤 周
This work focuses on the evolution behaviors of ring dark solitons (RDSs) and the following vortices after the collapses of RDSs in spin-1 Bose–Einstein condensates. We find that the weighted average of the initial depths of three components determines the number and motion trajectories of vortex dipoles. For the weighted average of the initial depths below the critical depth, two vortex dipoles form and start moving along the horizontal axis. For the weighted average depth above the critical depth, two or four vortex dipoles form, and all start moving along the vertical axis. For the RDS with weighted average depth at exactly the critical point, four vortex dipoles form, half of the vortex dipoles initiate movement vertically, and the other half initiate movement horizontally. Our conclusion is applicable to the two-component system studied in earlier research, indicating its universality.
{"title":"Dynamics of Ring Dark Solitons and the Following Vortices in Spin-1 Bose–Einstein Condensates","authors":"Yu Zhong, 毓 钟, Houria Triki, Qin Zhou and 勤 周","doi":"10.1088/0256-307x/41/7/070501","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/070501","url":null,"abstract":"This work focuses on the evolution behaviors of ring dark solitons (RDSs) and the following vortices after the collapses of RDSs in spin-1 Bose–Einstein condensates. We find that the weighted average of the initial depths of three components determines the number and motion trajectories of vortex dipoles. For the weighted average of the initial depths below the critical depth, two vortex dipoles form and start moving along the horizontal axis. For the weighted average depth above the critical depth, two or four vortex dipoles form, and all start moving along the vertical axis. For the RDS with weighted average depth at exactly the critical point, four vortex dipoles form, half of the vortex dipoles initiate movement vertically, and the other half initiate movement horizontally. Our conclusion is applicable to the two-component system studied in earlier research, indicating its universality.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Detecting tiny deformations or vibrations, particularly those associated with strains below 1%, is essential in various technological applications. Traditional intrinsic materials, including metals and semiconductors, face challenges in simultaneously achieving initial metallic state and strain-induced insulating state, hindering the development of highly sensitive mechanical sensors. Here we report an ultrasensitive mechanical sensor based on a strain-induced tunable ordered array of metallic and insulating states in the single-crystal bronze-phase vanadium dioxide [VO2(B)] quantum material. It is shown that the initial metallic state in the VO2(B) flake can be tuned to the insulating state by applying a weak uniaxial tensile strain. Such a unique property gives rise to a record-high gauge factor of above 607970, surpassing previous values by an order of magnitude, with excellent linearity and mechanical resilience as well as durability. As a proof-of-concept application, we use our proposed mechanical sensor to demonstrate precise sensing of the micro piece, gentle airflows and water droplets. We attribute the superior performance of the sensor to the strain-induced continuous metal-insulator transition in the single-crystal VO2(B) flake, evidenced by experimental and simulation results. Our findings highlight the potential of exploiting correlated quantum materials for next-generation ultrasensitive flexible mechanical sensors, addressing critical limitations in traditional materials.
{"title":"Ultrasensitive Mechanical Sensor Using Tunable Ordered Array of Metallic and Insulating States in Vanadium Dioxide","authors":"Zecheng Ma, 泽成 马, Shengnan Yan, 胜楠 闫, Fanqiang Chen, 繁强 陈, Yudi Dai, 玉頔 戴, Zenglin Liu, 增霖 刘, Kang Xu, 康 徐, Tao Xu, 涛 徐, Zhanqin Tong, 湛钦 童, Moyu Chen, 墨雨 陈, Lizheng Wang, 利铮 王, Pengfei Wang, 鹏飞 王, Litao Sun, 立涛 孙, Bin Cheng, 斌 程, Shi-Jun Liang, 世军 梁, Feng Miao and 峰 缪","doi":"10.1088/0256-307x/41/7/077101","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077101","url":null,"abstract":"Detecting tiny deformations or vibrations, particularly those associated with strains below 1%, is essential in various technological applications. Traditional intrinsic materials, including metals and semiconductors, face challenges in simultaneously achieving initial metallic state and strain-induced insulating state, hindering the development of highly sensitive mechanical sensors. Here we report an ultrasensitive mechanical sensor based on a strain-induced tunable ordered array of metallic and insulating states in the single-crystal bronze-phase vanadium dioxide [VO2(B)] quantum material. It is shown that the initial metallic state in the VO2(B) flake can be tuned to the insulating state by applying a weak uniaxial tensile strain. Such a unique property gives rise to a record-high gauge factor of above 607970, surpassing previous values by an order of magnitude, with excellent linearity and mechanical resilience as well as durability. As a proof-of-concept application, we use our proposed mechanical sensor to demonstrate precise sensing of the micro piece, gentle airflows and water droplets. We attribute the superior performance of the sensor to the strain-induced continuous metal-insulator transition in the single-crystal VO2(B) flake, evidenced by experimental and simulation results. Our findings highlight the potential of exploiting correlated quantum materials for next-generation ultrasensitive flexible mechanical sensors, addressing critical limitations in traditional materials.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-13DOI: 10.1088/0256-307x/41/7/074204
Houhui Yi, Xiaofeng Li, Junling Zhang, Xin Zhang, Guoli Ma
When pursuing femtosecond-scale ultrashort pulse optical communication, one cannot overlook higher-order nonlinear effects. Based on the fundamental theoretical model of the variable coefficient coupled high-order nonlinear Schrödinger equation (VCHNLSE), this paper explores the evolution of optical solitons in the presence of high-order nonlinear effects analytically. Besides, the interactions between two nearby optical solitons and the transmission of them in a nonuniform fiber are investigated. The stability of optical soliton transmission and interactions are found to be destroyed to varying degrees due to higher-order nonlinear effects. The outcomes will offer some theoretical references for achieving ultra-high energy optical solitons in the future.
{"title":"Higher-order nonlinear effects on optical soliton propagation and their interactions","authors":"Houhui Yi, Xiaofeng Li, Junling Zhang, Xin Zhang, Guoli Ma","doi":"10.1088/0256-307x/41/7/074204","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/074204","url":null,"abstract":"\u0000 When pursuing femtosecond-scale ultrashort pulse optical communication, one cannot overlook higher-order nonlinear effects. Based on the fundamental theoretical model of the variable coefficient coupled high-order nonlinear Schrödinger equation (VCHNLSE), this paper explores the evolution of optical solitons in the presence of high-order nonlinear effects analytically. Besides, the interactions between two nearby optical solitons and the transmission of them in a nonuniform fiber are investigated. The stability of optical soliton transmission and interactions are found to be destroyed to varying degrees due to higher-order nonlinear effects. The outcomes will offer some theoretical references for achieving ultra-high energy optical solitons in the future.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141348935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：