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| 1 | 笼目超导体CsV_(3)Sb_(5)中的拓扑表面态和平带的光电子谱证据显示文摘具有多种电子序和丰富物态的量子材料中往往蕴含着奇异的量子现象.不同电子序和量子态之间的相互作用也可以产生新的物理现象.本文揭示了笼目超导体CsV_(3)Sb_(5)的独特电子结构.作者在费米能附近发现了拓扑非平庸的表面态,这意味着拓扑物理很可能会参与到超导态中;同时还直接观测到了平带,这表明电子关联作用会在笼目超导体CsV_(3)Sb_(5)中起着重要的作用.这些结果表明笼目晶格CsV_(3)Sb_(5)不仅具有实现马约拉纳零模和奇异超导态的潜力,还是一个独特的可用于探索电荷密度波有序、拓扑量子态、强关联效应和超导性之间的相互作用的研究平台. | 胡勇 Samuel M.L.Teicher Brenden R.Ortiz 罗洋 彭舒婷 淮琳崴 马均章 Nicholas CPlumb Stephen D.Wilson 何俊峰 史明 | 2022 | Science Bulletin2022，67，5： | 2 |
| 2 | Evolution of superconductivity and charge order in pressurized RbV_(3)Sb_(5)显示文摘The kagome metals AV_(3)Sb_(5)(A=K,Rb,Cs)under ambient pressure exhibit an unusual charge order,from which superconductivity emerges.In this work,by applying hydrostatic pressure using a liquid pressure medium and carrying out electrical resistance measurements for RbV_(3)Sb_(5),we find that the charge order becomes suppressed under a modest pressure pc(1.4 GPa | 杜锋 罗帅帅 李蕊 Brenden R.Ortiz 陈晔 Stephen D.Wilson 宋宇 袁辉球 | 2022 | Chinese Physics B2022，31，1： | 1 |
| 3 | Kagome superconductors AV_(3)Sb_(5)(A=K,Rb,Cs)显示文摘The quasi-two-dimensional kagome materials AV_(3)Sb_(5)(A=K,Rb,Cs)were found to be a prime example of kagome superconductors,a new quantum platform to investigate the interplay between electron correlation effects,topology and geometric frustration.In this review,we report recent progress on the experimental and theoretical studies of AV_(3)Sb_(5)and provide a broad picture of this fast-developing field in order to stimulate an expanded search for unconventional kagome superconductors.We review the electronic properties of AV_(3)Sb_(5),the experimental measurements of the charge density wave state,evidence of time-reversal symmetry breaking and other potential hidden symmetry breaking in these materials.A variety of theoretical proposals and models that address the nature of the time-reversal symmetry breaking are discussed.Finally,we review the superconducting properties of AV_(3)Sb_(5),especially the potential pairing symmetries and the interplay between superconductivity and the charge density wave state. | Kun Jiang Tao Wu Jia-Xin Yin Zhenyu Wang M.Zahid Hasan Stephen D.Wilson Xianhui Chen Jiangping Hu | 2023 | National Science Review2023，10，2： | 1 |
| 4 | Surface-induced orbital-selective band reconstruction in kagome superconductor CsV_(3)Sb_(5)显示文摘The two-dimensional(2 D)kagome superconductor Cs V_(3)Sb_(5) has attracted much recent attention due to the coexistence of superconductivity,charge orders,topology and kagome physics,which manifest themselves as distinct electronic structures in both bulk and surface states of the material.An interesting next step is to manipulate the electronic states in this system.Here,we report angle-resolved photoemission spectroscopy(ARPES)evidence for a surface-induced orbitalselective band reconstruction in Cs V_(3)Sb_(5).A significant energy shift of the electron-like band aroundΓand a moderate energy shift of the hole-like band around M are observed as a function of time.This evolution is reproduced in a much shorter time scale by in-situ annealing of the Cs V_(3)Sb_(5) sample.Orbital-resolved density functional theory(DFT)calculations reveal that the momentum-dependent band reconstruction is associated with different orbitals for the bands aroundΓand M,and the time-dependent evolution points to the change of sample surface that is likely caused by the formation of Cs vacancies on the surface.Our results indicate the possibility of orbital-selective control of the band structure via surface modification,which may open a new avenue for manipulating exotic phenomena in this material system,including superconductivity. | 淮琳崴 罗洋 Samuel M.L.Teicher Brenden R.Ortiz 王铠泽 彭舒婷 魏志远 沈建昌 王冰倩 缪宇 孙秀鹏 欧志鹏 Stephen D.Wilson 何俊峰 | 2022 | Chinese Physics B2022，31，5： | 0 |
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