Structural and electrical transport properties of charge density wave material LaAgSb2 under high pressure

• 作者: Bowen Zhang Chao An Xuliang Chen Ying Zhou Yonghui Zhou Yifang Yuan Chunhua Chen Lili Zhang Xiaoping Yang Zhaorong Yang
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROP-ERTIES
• 页码范围: 462-468
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/abf643

摘要

Layered lanthanum silver antimonide LaAgSb2 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 LaAgSb2 single crystal.We show that the CDW order is destabilized under compression,as evidenced by the gradual suppression of magnetoresistance.At Pc ～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 LaAgSb2 single crystal,which can be helpful for its potential applications in the next-generation devices.