检索结果-南通市图书馆

Enhancement of Ising superconductivity in monolayer NbSe_(2) via surface fluorination

Science China(Technological Sciences) 2024年第7期67卷 2099-2106页

作者： WU JiZheng SHI WuJun WANG Chong duan wenhui XU Yong SI Chen School of Materials Science and Engineering Beihang UniversityBeijing 100191China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Shanghai High Repetition Rate XFEL and Extreme Light Facility(SHINE) ShanghaiTech UniversityShanghai 201210China State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China

Recently discovered Ising superconductors have garnered considerable interest due to their anomalously large in-plane upper critical fields(B_(c2)). However, the requisite strong spin-orbital coupling in the Ising pairing mechanism generally renders these superconductors heavy-element dominant with notably low superconducting transition temperatures(Tc). Here, based on the Migdal-Eliashberg theory and the mean-field Bogoliubov-de Gennes Hamiltonian, we demonstrate a significant enhancement of Ising superconductivity in monolayer NbSe_(2) through surface fluorination, as evidenced by concomitant improvements in Tcand Bc_(2). This enhancement arises from three predominant factors. Firstly, fluorine atoms symmetrically and stably adhere to both sides of the monolayer NbSe_(2), thereby maintaining the out-of-plane mirror symmetry and locking carrier spins ***, fluorination suppresses the charge density wave in monolayer NbSe_(2) and induces a van Hove singularity in the vicinity of the Fermi level, leading to a marked increase in the number of carriers and, consequently, strengthening the electron-phonon coupling(EPC). Lastly, the appearance of fluorine-related, low-frequency phonon modes further augments the EPC. Our findings suggest a promising avenue to elevate Tcin two-dimensional Ising superconductors without compromising their Ising pairing.

关键词： Ising superconductivity surface functionalization upper critical field NbSe_(2) first-principles calculations

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influences of chemical reactions on polysulfide reduction reaction process on promotor surface in Li-S batteries

引用

Nano Research 2024年第4期17卷 2712-2718页

作者： Yufeng Luo Zhenhan Fang Zixin Hong Shaorong duan Haitao Liu Hengcai Wu Qunqing Li Yuegang Zhang Shoushan Fan wenhui duan Jiaping Wang Tsinghua-Foxconn Nanotechnology Research Center Tsinghua UniversityBeijing 100084China Department of Physics Tsinghua UniversityBeijing 100084China Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing 100088China Frontier Science Center for Quantum Information Tsinghua UniversityBeijing 100084China

Polar promotors have been proven effective in catalyzing the polysulfide(PS)reduction reaction(PSRR)process in lithium-sulfur(Li-S)***,the promotor surface tends to be poisoned due to the accumulation of insoluble discharging products of lithium disulfide(Li_(2)S_(2))and lithium sulfide(Li_(2)S)during Li-S battery ***,we investigate the detailed PSRR mechanism on the surface of manganese sulfides(MnS)as a representative promoter by performing in-situ Raman mapping *** catalytic ability of MnS enables thorough electrochemical reduction of PSs to Li_(2)S_(2) and Li_(2)S on the MnS *** generated Li_(2)S_(2) and Li_(2)S then adsorb the dissolved PSs via chemical reactions among sulfur species during the subsequent PSRR *** phenomenon mitigates promotor poisoning and continuously improves the reversible ***,the assembled Li-S cell demonstrates excellent electrochemical performance after introducing a conductive interlayer containing a thin piece of carbon nanotube film and MnS promotors.

关键词： promotors polysulfides chemical reactions catalytic ability in-situ Raman measurements

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tunable quantum anomalous Hall effects in ferromagnetic van der Waals heterostructures

引用

National Science Review 2024年第3期11卷 100-107页

作者： Feng Xue Yusheng Hou Zhe Wang Zhiming Xu Ke He Ruqian Wu Yong Xu wenhui duan Beijing Academy of Quantum Information Sciences State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Center for Neutron Science and Technology School of Physics Sun Yat-sen University State Key Laboratory of Surface Physics Key Laboratory of Computational Physical Sciences and Department of PhysicsFudan University Frontier Science Center for Quantum Information Department of Physics and Astronomy University of California-Irvine Tencent Quantum Laboratory Tencent Technology(Shenzhen)Co.Ltd RIKEN Center for Emergent Matter Science(CEMS) Institute for Advanced Study Tsinghua University

The quantum anomalous Hall effect（QAHE） has unique advantages in topotronic applications, but it is still challenging to realize the QAHE with tunable magnetic and topological properties for building functional devices. Through systematic first-principles calculations, we predict that the in-plane magnetization induced QAHE with Chern numbers C = ±1 and the out-of-plane magnetization induced QAHE with high Chern numbers C = ±3 can be realized in a single material candidate, which is composed of van der Waals（vdW）coupled Bi and MnBi2Te4monolayers. The switching between different phases of QAHE can be controlled in multiple ways, such as applying strain or（weak） magnetic field or twisting the vdW materials. The prediction of an experimentally available material system hosting robust, highly tunable QAHE will stimulate great research interest in the field. Our work opens a new avenue for the realization of tunable QAHE and provides a practical material platform for the development of topological electronics.

关键词： quantum anomalous Hall effect topological quantum phase transition van der Waals heterostructures tunable Chern number high Chern number

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Engineering strong spin-frustration at the surface of three-dimensional graphene

引用

Science Bulletin 2024年第18期69卷 2816-2819页

作者： Wenjing Li Ken Chen Menglei Li Huiying Gao Jize Zhao Fawei Zheng wenhui duan Center for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systems School of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Physical Science and Technology Key Laboratory of Quantum Theory and Applications of MOELanzhou UniversityLanzhou 730000China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu ProvinceLanzhou UniversityLanzhou 730000China Department of Physics Capital Normal UniversityBeijing 100048China State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Institute for Advanced Study Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China

Since the first successful fabrication in 2004[1],graphene has received tremendous attention due to its extremely simple atomic structure and alluring physical *** example,its massless low energy excitations have a linear dispersion and thus its transport property is governed by Dirac equation instead of Schr?dinger *** special electronic structures suppress the intra-valley and inter-valley backscatterings,leading to the half-integer and fractional quantum Hall effect[2]under magnetic field and the relativistic quantum tunneling described by the Klein paradox[3].

关键词： properties. equation. quantum

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

人工智能和数据驱动的计算模拟

引用

中国科学：物理学、力学、天文学 2024年第4期54卷 45-50页

作者：李贺徐勇段文晖肖睿娟翁红明清华大学物理系北京100084 中国科学院物理研究所北京100190

“大数据+人工智能”代表着一种崭新的研究范式,对未来科学研究将产生深远影响.在计算物理领域,人工智能和数据驱动正促成新方法论的形成,也由此衍生出新的重要科学问题.本文将探讨人工智能和数据驱动的计算模拟这一新兴研究领域,综述... 详细信息

“大数据+人工智能”代表着一种崭新的研究范式,对未来科学研究将产生深远影响.在计算物理领域,人工智能和数据驱动正促成新方法论的形成,也由此衍生出新的重要科学问题.本文将探讨人工智能和数据驱动的计算模拟这一新兴研究领域,综述相关研究进展,并对未来的发展进行展望.

关键词：计算物理人工智能数据驱动

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

“小天地里大乾坤”,微米纳米技术赋能新质生产力

引用

前瞻科技 2024年第3期3卷 4-6页

作者：段文晖中国微米纳米技术学会中国科学院

微机电系统(Microelectromechanical System,MEMS)和纳米科技这两种典型微米纳米技术,其灵感和构想均可追溯至1959年12月29日,理查德·菲利普·费曼(Richard Phillips Feynman)教授在美国加州理工学院举行的美国物理学会年会上所发表的... 详细信息

微机电系统(Microelectromechanical System,MEMS)和纳米科技这两种典型微米纳米技术,其灵感和构想均可追溯至1959年12月29日,理查德·菲利普·费曼(Richard Phillips Feynman)教授在美国加州理工学院举行的美国物理学会年会上所发表的著名演讲——There’s Plenty of Room at the Bottom。他指出:“如果人类能够在原子/分子的尺度上加工材料、制备装置,我们将有许多激动人心的新发现,我们需要新型的微型化仪器来操纵纳米结构并测定其性质”。时至今日,纳米科技与MEMS的发展,均可将费曼的那次演讲视为一个伟大的预言和开端。

关键词：纳米科技微机电系统制备装置费曼著名演讲

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Erratum to:Influences of chemical reactions on polysulfide reduction reaction process on promotor surface in Li-S batteries

引用

Nano Research 2024年第5期17卷 4643-4643页

Erratum to Nano Research,2024,17(4):2712-2718 https://***/10.1007/s12274-023-6129-5 The affiliation of the author,wenhui duan,is“2 Department of Physics,Tsinghua University,Beijing 100084,China”,instead of“1 Tsinghua-Foxconn Nanotechnology Research Center,Tsinghua University,Beijing 100084,China;2 Department of Physics,Tsinghua University,Beijing 100084,China”.And the affiliation of the author,wenhui duan,in the online version and the ESM file of this paper has been corrected.

关键词： sulfide corrected tor

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Berry phase and topological effects of phonons

引用

National Science Review 2018年第3期5卷 314-316页

作者： Yizhou Liu Yong Xu wenhui duan State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Collaborative Innovation Center of Quantum Matter RIKEN Center for Emergent Matter Science (CEMS) Institute for Advanced Study Tsinghua University

Phonons as collective excitations of lattice vibrations are the main heat carriers in *** effort has been devoted to the investigation of phonons and related properties,giving rise to an intriguing field of phononics,which is of great importance to many practical applications,including heat dissipation,thermal barrier coating,thermoelectrics and thermal control devices[1].Meanwhile,research into topology-related physics,awarded the 2016 Nobel Prize in Physics,has led to discoveries of various exotic quantum states of matter,including the quantum(anomalous/spin)Hall

关键词： Berry phase and topological effects of phonons TRS

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Universal materials model of deep-learning density functional theory Hamiltonian

引用

Science Bulletin 2024年第16期69卷 2514-2521页

作者： Yuxiang Wang Yang Li Zechen Tang He Li Zilong Yuan Honggeng Tao Nianlong Zou Ting Bao Xinghao Liang Zezhou Chen Shanghua Xu Ce Bian Zhiming Xu Chong Wang Chen Si wenhui duan Yong Xu State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China Institute for Advanced Study Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China RIKEN Center for Emergent Matter Science(CEMS) Wako 351-0198Japan School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Realizing large materials models has emerged as a critical endeavor for materials research in the new era of artificial intelligence,but how to achieve this fantastic and challenging objective remains ***,we propose a feasible pathway to address this paramount pursuit by developing universal materials models of deep-learning density functional theory Hamiltonian(Deep H),enabling computational modeling of the complicated structure-property relationship of materials in *** constructing a large materials database and substantially improving the Deep H method,we obtain a universal materials model of Deep H capable of handling diverse elemental compositions and material structures,achieving remarkable accuracy in predicting material *** further showcase a promising application of fine-tuning universal materials models for enhancing specific materials *** work not only demonstrates the concept of Deep H's universal materials model but also lays the groundwork for developing large materials models,opening up significant opportunities for advancing artificial intelligencedriven materials discovery.

关键词： Large materials model Universal materials model Deep-learning density functional theory Artificial intelligence-driven materials discovery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The best thermoelectrics revisited in the quantum limit

引用

npj Computational Materials 2023年第1期9卷 372-377页

作者： Sifan Ding Xiaobin Chen Yong Xu wenhui duan State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China School of Science Harbin Institute of TechnologyShenzhen 518055China Frontier Science Center for Quantum Information Beijing 100084China RIKEN Center for Emergent Matter Science(CEMS) WakoSaitama 351-0198Japan Institute for Advanced Study Tsinghua UniversityBeijing 100084China

The classical problem of best thermoelectrics,which was believed originally solved by Mahan and Sofo[*** 93,7436(1996)],is revisited and discussed in the quantum *** express the thermoelectric figure of merit(zT)as a functional of electronic transmission probability T by the Landauer–Büttiker formalism,which is able to deal with thermoelectric transport ranging from ballistic to diffusive *** also propose to apply the calculus of variations to search for the optimal T giving the maximal *** study reveals that the optimal transmission probability T is a boxcar function instead of a delta function proposed by Mahan and Sofo,leading to zT exceeding the well-known Mahan–Sofo ***,we suggest realizing the optimal T in topological material *** work defines the theoretical upper limit for quantum thermoelectrics,which is of fundamental significance to the future development of thermoelectrics.

关键词： quantum limit optimal

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：