Tri-hexagonal charge order in kagome metal CsV_(3)Sb_(5) revealed by (121)Sb nuclear quadrupole resonance  

作　　者：Chao Mu Qiangwei Yin Zhijun Tu Chunsheng Gong Ping Zheng Hechang Lei Zheng Li Jianlin Luo 牟超;殷蔷薇;涂志俊;龚春生;郑萍;雷和畅;李政;雒建林(Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices,Renmin University of China,Beijing 100872,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices,Renmin University of China,Beijing 100872,China [4]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics B》2022年第1期10-14,共5页中国物理B（英文版）

基　　金：the National Key Research and Development Program of China(Grant Nos.2017YFA0302901,2018YFA0305702,2018YFE0202600,and 2016YFA0300504);the National Natural Science Foundation of China(Grant Nos.12134018,11921004,11822412,and 11774423);the Beijing Natural Science Foundation,China(Grant No.Z200005);the Strategic Priority Research Program and Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(Grant No.XDB33010100)。

摘　　要：We report ^(121)Sb nuclear quadrupole resonance(NQR)measurements on kagome superconductor CsV_(3)Sb_(5) with Tc=2.5 K.^(121)Sb NQR spectra split after a charge density wave(CDW)transition at 94 K,which demonstrates a commensurate CDW state.The coexistence of the high temperature phase and the CDW phase between 91 K and 94 K manifests that it is a first order phase transition.The CDW order exhibits tri-hexagonal deformation with a lateral shift between the adjacent kagome layers,which is consistent with 2×2×2 superlattice modulation.The superconducting state coexists with CDW order and shows a conventional s-wave behavior in the bulk state.

关 键 词：charge-density-wave systems nuclear magnetic resonance 

分 类 号：O469[理学—凝聚态物理]