摘要
Layered lanthanum silver antimonide LaAgSb_(2)exhibits both charge density wave(CDW)order and Dirac-cone-like band structure at ambient pressure.Here,we systematically investigate the pressure evolution of structural and electronic properties of LaAgSb_(2)single crystal.We show that the CDW order is destabilized under compression,as evidenced by the gradual suppression of magnetoresistance.At P_(C)~22 GPa,synchrotron x-ray diffraction and Raman scattering measurements reveal a structural modification at room-temperature.Meanwhile,the sign change of the Hall coefficient is observed at 5 K.Our results demonstrate the tunability of CDW order in the pressurized LaAgSb_(2)single crystal,which can be helpful for its potential applications in the next-generation devices.
作者
Bowen Zhang
Chao An
Xuliang Chen
Ying Zhou
Yonghui Zhou
Yifang Yuan
Chunhua Chen
Lili Zhang
Xiaoping Yang
Zhaorong Yang
张博文;安超;陈绪亮;周颖;周永惠;袁亦方;陈春华;张丽丽;杨晓萍;杨昭荣(Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,Chinese Academy of Sciences,Hefei 230031,China;Science Island Branch,Graduate School of University of Science and Technology of China,Hefei 230026,China;Information Materials and Intelligent Sensing Laboratory of Anhui Province,Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Anhui University),Ministry of Education,Hefei 230601,China;Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 200031,China;High Magnetic Field Laboratory of Anhui Province,Hefei 230031,China)
基金
the National Key Research and Development Program of China(Grant Nos.2018YFA0305700,2017YFA0403600,and2016YFA0401804)
the National Natural Science Foundation of China(Grant Nos.U1632275,U19A2093,U1932152,U1632162,12004004,11874362,11804344,11704387,and 11674325)
the Natural Science Foundation of Anhui Province,China(Grant Nos.1908085QA18,2008085QA40,and1808085MA06)
the Users with Excellence Project of Hefei Science Center CAS(Grant Nos.2018HSC-UE012,2020HSC-CIP014,2020HSC-UE015,and2021HSC-UE008)
the Major Program of Development Foundation of Hefei Center for Physical Science and Technology(Grant No.2018ZYFX002)
supported by the High Magnetic Field Laboratory of Anhui Province(Grant No.AHHM-FX-2020-02)
supported by the Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant No.2020443)。
