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

被引：4

作者：

Zhang, Bowen ^{[1
,2
]}

An, Chao ^{[3
,4
]}

Chen, Xuliang ^{[1
,6
]}

Zhou, Ying ^{[3
]}

Zhou, Yonghui ^{[1
,6
]}

Yuan, Yifang ^{[1
]}

Chen, Chunhua ^{[1
]}

Zhang, Lili ^{[5
]}

Yang, Xiaoping ^{[1
,6
]}

Yang, Zhaorong ^{[1
,3
,6
]}

机构：

[1] Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Peoples R China

[3] Anhui Univ, Informat Mat & Intelligent Sensing Lab Anhui Prov, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China

[4] Anhui Univ, Minist Educ, Key Lab Struct & Funct Regulat Hybrid Mat, Hefei 230601, Peoples R China

[5] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 200031, Peoples R China

[6] High Magnet Field Lab Anhui Prov, Hefei 230031, Peoples R China

来源：

CHINESE PHYSICS B | 2021年 / 30卷 / 07期

基金：

中国国家自然科学基金;

关键词：

high pressure; charge density wave; crystal structure; electrical transport;

D O I：

10.1088/1674-1056/abf643

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

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 P (C) similar to 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.

引用

页数：6

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