Pub Date : 2024-04-30DOI: 10.1088/0256-307x/41/5/057403
Jie-Ran Xue, 洁然 薛, Fa Wang and 垡 王
The recent discovery of possible high temperature superconductivity in single crystals of La3Ni2O7 under pressure renews the interest in research on nickelates. The density functional theory calculations reveal that both dz2 and dx2–y2 orbitals are active, which suggests a minimal two-orbital model to capture the low-energy physics of this system. In this work, we study a bilayer two-orbital t–J model within multiband Gutzwiller approximation, and discuss the magnetism as well as the superconductivity over a wide range of the hole doping. Owing to the inter-orbital super-exchange process between dz2 and dx2–y2 orbitals, the induced ferromagnetic coupling within layers competes with the conventional antiferromagnetic coupling, and leads to complicated hole doping dependence for the magnetic properties in the system. With increasing hole doping, the system transfers to A-type antiferromagnetic state from the starting G-type antiferromagnetic (G-AFM) state. We also find the inter-layer superconducting pairing of dx2–y2 orbitals dominates due to the large hopping parameter of dz2 along the vertical inter-layer bonds and significant Hund’s coupling between dz2 and dx2–y2 orbitals. Meanwhile, the G-AFM state and superconductivity state can coexist in the low hole doping regime. To take account of the pressure, we also analyze the impacts of inter-layer hopping amplitude on the system properties.
{"title":"Magnetism and Superconductivity in the t–J Model of La3Ni2O7 Under Multiband Gutzwiller Approximation","authors":"Jie-Ran Xue, 洁然 薛, Fa Wang and 垡 王","doi":"10.1088/0256-307x/41/5/057403","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/057403","url":null,"abstract":"The recent discovery of possible high temperature superconductivity in single crystals of La3Ni2O7 under pressure renews the interest in research on nickelates. The density functional theory calculations reveal that both dz2 and dx2–y2 orbitals are active, which suggests a minimal two-orbital model to capture the low-energy physics of this system. In this work, we study a bilayer two-orbital t–J model within multiband Gutzwiller approximation, and discuss the magnetism as well as the superconductivity over a wide range of the hole doping. Owing to the inter-orbital super-exchange process between dz2 and dx2–y2 orbitals, the induced ferromagnetic coupling within layers competes with the conventional antiferromagnetic coupling, and leads to complicated hole doping dependence for the magnetic properties in the system. With increasing hole doping, the system transfers to A-type antiferromagnetic state from the starting G-type antiferromagnetic (G-AFM) state. We also find the inter-layer superconducting pairing of dx2–y2 orbitals dominates due to the large hopping parameter of dz2 along the vertical inter-layer bonds and significant Hund’s coupling between dz2 and dx2–y2 orbitals. Meanwhile, the G-AFM state and superconductivity state can coexist in the low hole doping regime. To take account of the pressure, we also analyze the impacts of inter-layer hopping amplitude on the system properties.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141062475","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}
Research of Maxwell demon and quantum entanglement is important because of its foundational significance in physics and its potential applications in quantum information. Previous studies on the Maxwell demon have primarily focused on thermodynamics, taking into account quantum correlations. Here we consider from another perspective and ask whether quantum non-locality correlations can be simulated by performing work. The Maxwell demon-assisted Einstein–Podolsky–Rosen (EPR) steering is thus proposed, which implies a new type of loophole. The application of Landauer’s erasure principle suggests that the only way to close this loophole during a steering task is by continuously monitoring the heat fluctuation of the local environment by the participant. We construct a quantum circuit model of Maxwell demon-assisted EPR steering, which can be demonstrated by current programmable quantum processors, such as superconducting quantum computers. Based on this quantum circuit model, we obtain a quantitative formula describing the relationship between energy dissipation due to the work of the demon and quantum non-locality correlation. The result is of great physical interest because it provides a new way to explore and understand the relationship between quantum non-locality, information, and thermodynamics.
{"title":"Maxwell Demon and Einstein–Podolsky–Rosen Steering","authors":"Meng-Jun Hu, 孟军 胡, Xiao-Min Hu, 晓敏 胡, Yong-Sheng Zhang and 永生 张","doi":"10.1088/0256-307x/41/5/050302","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/050302","url":null,"abstract":"Research of Maxwell demon and quantum entanglement is important because of its foundational significance in physics and its potential applications in quantum information. Previous studies on the Maxwell demon have primarily focused on thermodynamics, taking into account quantum correlations. Here we consider from another perspective and ask whether quantum non-locality correlations can be simulated by performing work. The Maxwell demon-assisted Einstein–Podolsky–Rosen (EPR) steering is thus proposed, which implies a new type of loophole. The application of Landauer’s erasure principle suggests that the only way to close this loophole during a steering task is by continuously monitoring the heat fluctuation of the local environment by the participant. We construct a quantum circuit model of Maxwell demon-assisted EPR steering, which can be demonstrated by current programmable quantum processors, such as superconducting quantum computers. Based on this quantum circuit model, we obtain a quantitative formula describing the relationship between energy dissipation due to the work of the demon and quantum non-locality correlation. The result is of great physical interest because it provides a new way to explore and understand the relationship between quantum non-locality, information, and thermodynamics.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141152345","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}
Based on first-principles calculations, we systematically study the stacking energy and interlayer magnetic interaction of the heterobilayer composed of CrI3 and CrSe2 monolayers. It is found that the stacking order plays a crucial role in the interlayer magnetic coupling. Among all possible stacking structures, the AA-stacking is the most stable heterostructure, exhibiting interlayer antiferromagnetic interactions. Interestingly, the interlayer magnetic interaction can be effectively tuned by biaxial strain. A 4.3% compressive strain would result in a ferromagnetic interlayer interaction in all stacking orders. These results reveal the magnetic properties of CrI3/CrSe2 heterostructure, which is expected to be applied to spintronic devices.
{"title":"Interlayer Magnetic Interaction in the CrI3/CrSe2 Heterostructure","authors":"Qiu-Hao Wang, 秋皓 王, Mei-Yan Ni, 美燕 倪, Shu-Jing Li, 淑静 李, Fa-Wei Zheng, 法伟 郑, Hong-Yan Lu, 洪艳 路, Ping Zhang and 平 张","doi":"10.1088/0256-307x/41/5/057401","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/057401","url":null,"abstract":"Based on first-principles calculations, we systematically study the stacking energy and interlayer magnetic interaction of the heterobilayer composed of CrI3 and CrSe2 monolayers. It is found that the stacking order plays a crucial role in the interlayer magnetic coupling. Among all possible stacking structures, the AA-stacking is the most stable heterostructure, exhibiting interlayer antiferromagnetic interactions. Interestingly, the interlayer magnetic interaction can be effectively tuned by biaxial strain. A 4.3% compressive strain would result in a ferromagnetic interlayer interaction in all stacking orders. These results reveal the magnetic properties of CrI3/CrSe2 heterostructure, which is expected to be applied to spintronic devices.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888498","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}
Controlling collective electronic states holds great promise for the development of innovative devices. Here, we experimentally detect the modification of the charge density wave (CDW) phase transition within a 1T-TaS2 layer in a WS2/1T-TaS2 heterostructure using time-resolved ultrafast spectroscopy. Laser-induced charge transfer doping strongly suppresses the commensurate CDW (CCDW) phase, which results in a significant decrease in both the phase transition temperature (T c) and phase transition stiffness (PTS). We interpret that photo-induced hole doping, when surpassing a critical threshold value of ~1018/cm3, sharply decreases the phase transition energy barrier. Our results provide new insights into controlling the CDW phase transition, paving the way for optical-controlled novel devices based on CDW materials.
{"title":"Photodoping-modified charge density wave phase transition in WS2/1T-TaS2 heterostructure","authors":"Rui Wang, Jianwei Ding, Fei Sun, Jimin Zhao, Xiaohui Qiu","doi":"10.1088/0256-307x/41/5/057801","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/057801","url":null,"abstract":"\u0000 Controlling collective electronic states holds great promise for the development of innovative devices. Here, we experimentally detect the modification of the charge density wave (CDW) phase transition within a 1T-TaS2 layer in a WS2/1T-TaS2 heterostructure using time-resolved ultrafast spectroscopy. Laser-induced charge transfer doping strongly suppresses the commensurate CDW (CCDW) phase, which results in a significant decrease in both the phase transition temperature (T\u0000 c) and phase transition stiffness (PTS). We interpret that photo-induced hole doping, when surpassing a critical threshold value of ~1018/cm3, sharply decreases the phase transition energy barrier. Our results provide new insights into controlling the CDW phase transition, paving the way for optical-controlled novel devices based on CDW materials.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140671453","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 : 2024-04-23DOI: 10.1088/0256-307x/41/5/054201
Zipeng Xu, Xuan Wang, Chuan-Fei Yao, Lin-Jing Yang, Ping-Xue Li
An all-fiber polarization maintaining high-power laser system operating at 1.7 µm based on the Raman-induced soliton self-frequency shifting effect is demonstrated. The entirely fiberized system is built by erbium-doped oscillator and two-stage amplifiers with polarization maintaining commercial silica fibers and devices, which can provide robust and stable soliton generation. High power soliton laser with the average of 0.28 W, the repetition rate of 42.7 MHz, and pulse duration of 515 fs is generated directly from the main amplifier. Our experiment provides a feasible method for high-power all-fiber polarization maintaining femtosecond laser generation working at 1.7 μm.
{"title":"High power Raman soliton generation at 1.7 µm in all-fiber polarization-maintaining erbium-doped amplifier","authors":"Zipeng Xu, Xuan Wang, Chuan-Fei Yao, Lin-Jing Yang, Ping-Xue Li","doi":"10.1088/0256-307x/41/5/054201","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/054201","url":null,"abstract":"\u0000 An all-fiber polarization maintaining high-power laser system operating at 1.7 µm based on the Raman-induced soliton self-frequency shifting effect is demonstrated. The entirely fiberized system is built by erbium-doped oscillator and two-stage amplifiers with polarization maintaining commercial silica fibers and devices, which can provide robust and stable soliton generation. High power soliton laser with the average of 0.28 W, the repetition rate of 42.7 MHz, and pulse duration of 515 fs is generated directly from the main amplifier. Our experiment provides a feasible method for high-power all-fiber polarization maintaining femtosecond laser generation working at 1.7 μm.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140666924","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}
Compared with conventional solid-state electrolytes, halide solid-state electrolytes have several advantages such as a wider electrochemical window, better compatibility with oxide cathode materials, improved air stability, and easier preparation conditions making them conductive to industrial production. We focused on a typical halide solid-state electrolyte, Li3InCl6 and predicted the most stable structure after doping with Br, F, and Ga by using the Alloy Theoretic Automated Toolkit based on first-principles calculations, and verified the accuracy of the prediction model. To investigate the potential of three equivalently doped ground state configurations of Li3InCl6 as solidstate electrolytes for all-solid-state lithium-ion batteries, their specific properties such as crystal structure, band gap, convex packing energy, electrochemical stability window, and lithium-ion conductivity were computationally analyzed using first-principles calculations. After a comprehensive evaluation, it was determined that the F-doped ground state configuration Li3InCl2.5F3.5 exhibits better thermal stability, wider electrochemical stability window, and better lithium ion conductivity (1.80 mS cm-1 at room temperature). Therefore, Li3InCl2.5F3.5 has the potential to be used in the field of all-solid-state lithium-ion batteries as a new type of halide electrolyte.
与传统固态电解质相比，卤化物固态电解质具有多种优势，如电化学窗口更宽、与氧化物阴极材料的兼容性更好、空气稳定性更强、制备条件更简便等，因此可用于工业生产。我们以典型的卤化物固态电解质 Li3InCl6 为研究对象，利用基于第一性原理计算的合金理论自动工具包预测了掺杂 Br、F 和 Ga 后最稳定的结构，并验证了预测模型的准确性。为了研究三种等效掺杂基态构型的 Li3InCl6 作为全固态锂离子电池固态电解质的潜力，利用第一性原理计算分析了它们的晶体结构、带隙、凸堆积能、电化学稳定窗口和锂离子电导率等具体性质。经过综合评估，确定掺杂 F 的基态构型 Li3InCl2.5F3.5 具有更好的热稳定性、更宽的电化学稳定窗口和更高的锂离子电导率（室温下为 1.80 mS cm-1）。因此，Li3InCl2.5F3.5 作为一种新型卤化物电解质，有望应用于全固态锂离子电池领域。
{"title":"Prediction of Ground State Configurations and Electrochemical Properties of Li3InCl6 doped with F, Br and Ga","authors":"Zhengyu Lu, Le-Tian Chen, Xu Hu, Su-Ya Chen, Xu Zhang, Zhen Zhou","doi":"10.1088/0256-307x/41/5/058201","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/058201","url":null,"abstract":"\u0000 Compared with conventional solid-state electrolytes, halide solid-state electrolytes have several advantages such as a wider electrochemical window, better compatibility with oxide cathode materials, improved air stability, and easier preparation conditions making them conductive to industrial production. We focused on a typical halide solid-state electrolyte, Li3InCl6 and predicted the most stable structure after doping with Br, F, and Ga by using the Alloy Theoretic Automated Toolkit based on first-principles calculations, and verified the accuracy of the prediction model. To investigate the potential of three equivalently doped ground state configurations of Li3InCl6 as solidstate electrolytes for all-solid-state lithium-ion batteries, their specific properties such as crystal structure, band gap, convex packing energy, electrochemical stability window, and lithium-ion conductivity were computationally analyzed using first-principles calculations. After a comprehensive evaluation, it was determined that the F-doped ground state configuration Li3InCl2.5F3.5 exhibits better thermal stability, wider electrochemical stability window, and better lithium ion conductivity (1.80 mS cm-1 at room temperature). Therefore, Li3InCl2.5F3.5 has the potential to be used in the field of all-solid-state lithium-ion batteries as a new type of halide electrolyte.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140671915","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 : 2024-04-19DOI: 10.1088/0256-307x/41/5/057501
Xinxin Jiang, Zhikuan Wang, Chong Li, Xuelian Sun, Lei Yang, Dong-Xu Li, Bin Cui, Desheng Liu
Electrical control of magnetism in van der Waals semiconductors is a promising step toward developing two-dimensional ultralow-power-consumption spintronic devices for processing and storing information. Here, we propose a design for two-dimensional van der Waals heterostructures (vdWHs) that can host ferroelectricity and ferromagnetism simultaneously under hole doping. By contacting an InSe monolayer and forming an InSe/In2Se3 vdWH, the switchable built-in electric field from the reversible out-of-plane polarization enables robust control of the band alignment. Furthermore, switching between the two ferroelectric states (P↑ and P↓) of hole-doped In2Se3 with an external electric field can interchange the ON and OFF states of the nonvolatile magnetism. More interestingly, doping concentration and strain can effectively tune the magnetic moment and polarization energy. Therefore, this provides a platform for realizing multiferroics in ferroelectric heterostructures, showing great potential in nonvolatile memories and ferroelectric field-effect transistors.
对范德华半导体中的磁性进行电控制，是开发用于处理和存储信息的二维超低功耗自旋电子器件的一个很有前景的步骤。在此，我们提出了一种二维范德瓦尔斯异质结构（vdWHs）的设计方案，在空穴掺杂的情况下，它可以同时承载铁电性和铁磁性。通过接触 InSe 单层并形成 InSe/In2Se3 vdWH，可逆面外极化产生的可切换内置电场实现了对带排列的稳健控制。此外，在外加电场的作用下，在空穴掺杂的 In2Se3 的两种铁电状态（P↑ 和 P↓）之间切换，可以交换非易失性磁性的 ON 和 OFF 状态。更有趣的是，掺杂浓度和应变可以有效调节磁矩和极化能。因此，这为在铁电异质结构中实现多铁性提供了一个平台，在非易失性存储器和铁电场效应晶体管中显示出巨大的潜力。
{"title":"Hole doped nonvolatile and electrically controllable magnetism in van der Waals ferroelectric heterostructures","authors":"Xinxin Jiang, Zhikuan Wang, Chong Li, Xuelian Sun, Lei Yang, Dong-Xu Li, Bin Cui, Desheng Liu","doi":"10.1088/0256-307x/41/5/057501","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/057501","url":null,"abstract":"\u0000 Electrical control of magnetism in van der Waals semiconductors is a promising step toward developing two-dimensional ultralow-power-consumption spintronic devices for processing and storing information. Here, we propose a design for two-dimensional van der Waals heterostructures (vdWHs) that can host ferroelectricity and ferromagnetism simultaneously under hole doping. By contacting an InSe monolayer and forming an InSe/In2Se3 vdWH, the switchable built-in electric field from the reversible out-of-plane polarization enables robust control of the band alignment. Furthermore, switching between the two ferroelectric states (P↑ and P↓) of hole-doped In2Se3 with an external electric field can interchange the ON and OFF states of the nonvolatile magnetism. More interestingly, doping concentration and strain can effectively tune the magnetic moment and polarization energy. Therefore, this provides a platform for realizing multiferroics in ferroelectric heterostructures, showing great potential in nonvolatile memories and ferroelectric field-effect transistors.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140683473","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 : 2024-04-17DOI: 10.1088/0256-307x/41/5/057502
Guo-Liang Yu, Xin-Yan He, Sheng-Bin Shi, Yang Qiu, Mingmin Zhu, Jia-Wei Wang, Yan Li, Yuan-Xun Li, Jie Wang, Haomiao Zhou
Magnetic domain wall (DW), as one of the promising information carriers in spintronic devices, have been widely investigated owing to their nonlinear dynamics and tunable properties. Here, we have theoretically and numerically demonstrated the DW dynamics driven by the synergistic interaction between current-induced spintransfer torque (STT) and voltage-controlled strain gradient (VCSG) in multiferroic heterostructures. Through electromechanical and micromagnetic simulations, we have shown that a desirable strain gradient can be created and further modulated the equilibrium position and velocity of the current-driven DW motion. Meanwhile, an analytical Thiele’s model is developed to describe the steady motion of DW and the analytical results are quite consistent with the simulation one. Finally, we find that this combination effect can be leveraged to design DW-based biological neurons where the synergistic interaction between STT and VCSG-driven DW motion as integrating and leaking motivates mimicking leaky-integrate-and-fire (LIF) and self-reset function. Importantly, the firing response of the LIF neuron can be efficiently modulated, facilitating the exploration of tunable activation function generators, which can further help improve the computational capability of the neuromorphic system.
{"title":"The Combined Effect of Spin-transfer Torque and Voltage-controlled Strain Gradient on Magnetic Domain-wall Dynamics: Toward Tunable Spintronic Neuron","authors":"Guo-Liang Yu, Xin-Yan He, Sheng-Bin Shi, Yang Qiu, Mingmin Zhu, Jia-Wei Wang, Yan Li, Yuan-Xun Li, Jie Wang, Haomiao Zhou","doi":"10.1088/0256-307x/41/5/057502","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/057502","url":null,"abstract":"\u0000 Magnetic domain wall (DW), as one of the promising information carriers in spintronic devices, have been widely investigated owing to their nonlinear dynamics and tunable properties. Here, we have theoretically and numerically demonstrated the DW dynamics driven by the synergistic interaction between current-induced spintransfer torque (STT) and voltage-controlled strain gradient (VCSG) in multiferroic heterostructures. Through electromechanical and micromagnetic simulations, we have shown that a desirable strain gradient can be created and further modulated the equilibrium position and velocity of the current-driven DW motion. Meanwhile, an analytical Thiele’s model is developed to describe the steady motion of DW and the analytical results are quite consistent with the simulation one. Finally, we find that this combination effect can be leveraged to design DW-based biological neurons where the synergistic interaction between STT and VCSG-driven DW motion as integrating and leaking motivates mimicking leaky-integrate-and-fire (LIF) and self-reset function. Importantly, the firing response of the LIF neuron can be efficiently modulated, facilitating the exploration of tunable activation function generators, which can further help improve the computational capability of the neuromorphic system.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140690526","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 : 2024-04-17DOI: 10.1088/0256-307x/41/5/054701
Jing Xu, Rui Xiao, Hong Li
Searching and designing new materials play crucial roles in the development of energy storage devices. In today's world where machine learning technology has shown strong predictive ability for various tasks, the combination with machine learning technology will accelerate the process of material development. Herein, we develop ESM Cloud Toolkit for energy storage materials based on MatElab platform, which is designed as a convenient and accurate way to automatically record and save the raw data of scientific research. The ESM Cloud Toolkit includes multiple features such as automatic archiving of computational simulation data, post-processing of experimental data and machine learning applications. It makes the entire research workflow more automated and reduces the entry barrier for the application of machine learning technology in the domain of energy storage materials. It integrates data archive, traceability, processing, and reutilization, and allowing individual research data to play a greater role in the era of AI.
{"title":"ESM Cloud Toolkit: A copilot for energy storage material research","authors":"Jing Xu, Rui Xiao, Hong Li","doi":"10.1088/0256-307x/41/5/054701","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/054701","url":null,"abstract":"\u0000 Searching and designing new materials play crucial roles in the development of energy storage devices. In today's world where machine learning technology has shown strong predictive ability for various tasks, the combination with machine learning technology will accelerate the process of material development. Herein, we develop ESM Cloud Toolkit for energy storage materials based on MatElab platform, which is designed as a convenient and accurate way to automatically record and save the raw data of scientific research. The ESM Cloud Toolkit includes multiple features such as automatic archiving of computational simulation data, post-processing of experimental data and machine learning applications. It makes the entire research workflow more automated and reduces the entry barrier for the application of machine learning technology in the domain of energy storage materials. It integrates data archive, traceability, processing, and reutilization, and allowing individual research data to play a greater role in the era of AI.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140693226","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 : 2024-04-17DOI: 10.1088/0256-307x/41/5/057302
Lingling Gao, J. Lai, Dong Chen, Cuiying Pei, Qi Wang, Yi Zhao, Changhua Li, W. Cao, Juefei Wu, Yulin Chen, Xingqiu Chen, Yan Sun, C. Felser, Yanpeng Qi
Recently, the giant intrinsic anomalous Hall effect (AHE) has been observed in the materials with kagome lattice. In this study, we systematically investigate the influence of high pressure on the AHE in the ferromagnet LiMn6Sn6 with clean Mn kagome lattice. Our in-situ high-pressure Raman spectroscopy indicates that the crystal structure of LiMn6Sn6 maintains a hexagonal phase under high pressures up to 8.51 GPa. The anomalous Hall conductivity (AHC) σxy A remains around 150 Ω-1 cm-1, dominated by the intrinsic mechanism. Combined with theoretical calculations, our results indicate that the stable AHE under pressure in LiMn6Sn6 originates from the robust electronic and magnetic structure.
{"title":"Pressure-tunable large anomalous Hall effect in ferromagnetic metal LiMn6Sn6","authors":"Lingling Gao, J. Lai, Dong Chen, Cuiying Pei, Qi Wang, Yi Zhao, Changhua Li, W. Cao, Juefei Wu, Yulin Chen, Xingqiu Chen, Yan Sun, C. Felser, Yanpeng Qi","doi":"10.1088/0256-307x/41/5/057302","DOIUrl":"https://doi.org/10.1088/0256-307x/41/5/057302","url":null,"abstract":"\u0000 Recently, the giant intrinsic anomalous Hall effect (AHE) has been observed in the materials with kagome lattice. In this study, we systematically investigate the influence of high pressure on the AHE in the ferromagnet LiMn6Sn6 with clean Mn kagome lattice. Our in-situ high-pressure Raman spectroscopy indicates that the crystal structure of LiMn6Sn6 maintains a hexagonal phase under high pressures up to 8.51 GPa. The anomalous Hall conductivity (AHC) σxy\u0000 A remains around 150 Ω-1 cm-1, dominated by the intrinsic mechanism. Combined with theoretical calculations, our results indicate that the stable AHE under pressure in LiMn6Sn6 originates from the robust electronic and magnetic structure.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140692393","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}
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