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Manipulating charge density wave state in kagome compound RbV3Sb5

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Chinese Physics B 2023年第9期 453-457页

作者：孟雨欣薛成龙窦立国赵伟民汪琪玮徐永杰刘祥麒夏威郭艳峰李绍春 National Laboratory of Solid State Microstructures School of Physics Nanjing University Collaborative Innovation Center of Advanced Microstructures Nanjing University School of Physical Science and Technology Shanghai Tech University Shanghai Tech Laboratory for Topological Physics Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing University Hefei National Laboratory

Owing to the unique electronic structure, kagome materials AV3Sb5(A = K, Rb, Cs) provide a fertile platform of quantum phenomena such as the strongly correlated state and topological Dirac band. It is well known that RbV3Sb5exhibits a 2 × 2 unconventional charge density wave(CDW) state at low temperature, and the mechanism is ***, by using scanning tunneling microscopy/spectroscopy(STM/STS), we successfully manipulated the CDW state in the Sb plane of RbV3Sb5, and realized a new3(1/2) ×3(1/2) modulation together with the ubiquitous 2 × 2 period in the CDW state of RbV3Sb5. This work provides a new understanding of the collective quantum ground states in the kagome materials.

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Electron-Exciton Coupling in 1T-TiSe_(2)Bilayer

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Chinese Physics Letters 2023年第5期40卷 59-65页

作者：朱立赵伟民贾振宇李慧平谢学栋李启远汪琪玮窦立国胡聚罡张翼朱文光于顺利李建新李绍春 National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresSchool of PhysicsNanjing UniversityNanjing 210093China International Center for Quantum Design of Functional Materials(ICQD) Hefei National Laboratory for Physical Sciences at the Microscaleand Synergetic Innovation Center of Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Strongly Coupled Quantum Matter Physics of Chinese Academy of Sciences School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230026China Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing UniversityNanjing 210093China

Excitons in solid state are bosons generated by electron-hole pairs as the Coulomb screening is sufficiently *** exciton condensation can result in exotic physics such as super-fluidity and insulating *** charge density wave(CDW)state,1T-TiSe_(2) is one of the candidates that may host the exciton ***,to envision its excitonic effect is still challenging,particularly at the two-dimensional limit,which is applicable to future ***,we realize the epitaxial 1T-TiSe_(2) bilayer,the two-dimensional limit for its 2×2×2 CDW order,to explore the exciton-associated *** means of high-resolution scanning tunneling spectroscopy and quasiparticle interference,we discover an unexpected state residing below the conduction band and right within the CDW gap *** corroborated by our theoretical analysis,this mysterious phenomenon is in good agreement with the electron-exciton *** study provides a material platform to explore exciton-based electronics and opto-electronics.

关键词： effect limit Electron

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Manipulating charge density wave state in kagome compound RbV_(3)Sb_(5)

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中国物理B:英文版 2023年第9期32卷 391-395页

作者：孟雨欣薛成龙窦立国赵伟民汪琪玮徐永杰刘祥麒夏威郭艳峰李绍春 National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Shanghai Tech Laboratory for Topological Physics Shanghai 201210China Jiangsu Provincial Key Laboratory for Nanotechnology Nanjing UniversityNanjing 210093China Hefei National Laboratory Hefei 230088China

Owing to the unique electronic structure,kagome materials AV_(3)Sb_(5)(A=K,Rb,Cs)provide a fertile platform of quantum phenomena such as the strongly correlated state and topological Dirac *** is well known that RbV_(3)Sb_(5)exhibits a 2×2 unconventional charge density wave(CDW)state at low temperature,and the mechanism is ***,by using scanning tunneling microscopy/spectroscopy(STM/STS),we successfully manipulated the CDW state in the Sb plane of RbV_(3)Sb_(5),and realized a new3(1/2)×3(1/2)modulation together with the ubiquitous 2×2 period in the CDW state of RbV_(3)Sb_(5).This work provides a new understanding of the collective quantum ground states in the kagome materials.

关键词： kagome material charge density wave scanning tunneling microscopy

北京西郊砂石坑蓄洪工程场地环境质量现状评价

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资源环境与工程 2016年第3期30卷 458-463页

作者：姚旭初王广才汪琪汪德云张琦玮张如满北京市水利规划设计研究院北京100048 中国地质大学北京100083

通过调查研究区历史资料、现场检测与监测、相关性分析等地下水污染现状评价,查明地下水中污染物的分布特征、土壤中污染物的分布特征,以及地下水和土壤之间的污染物组分关系,分析污染物的来源,其主要来自上游受到污染的地下水、填埋坑... 详细信息

通过调查研究区历史资料、现场检测与监测、相关性分析等地下水污染现状评价,查明地下水中污染物的分布特征、土壤中污染物的分布特征,以及地下水和土壤之间的污染物组分关系,分析污染物的来源,其主要来自上游受到污染的地下水、填埋坑大气降水淋滤和现有西侧坑内地表水入渗,为"北京西郊砂石坑蓄洪工程"成功立项提供关键支撑。

关键词：砂石坑蓄洪工程地下水土壤环境质量污染现状评价

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