Evidence for a Dirac nodal-line semimetal in SrAs3

被引：42

作者：

Li, Shichao ^{[1
,2
]}

Guo, Zhaopeng ^{[1
,2
]}

Fu, Dongzhi ^{[1
,2
]}

Pan, Xing-Chen ^{[1
,2
]}

Wang, Jinghui ^{[1
,2
]}

Ran, Kejing ^{[1
,2
]}

Bao, Song ^{[1
,2
]}

Ma, Zhen ^{[1
,2
]}

Cai, Zhengwei ^{[1
,2
]}

Wang, Rui ^{[3
]}

Yu, Rui ^{[4
]}

Sun, Jian ^{[1
,2
,5
]}

Song, Fengqi ^{[1
,2
,5
]}

Wen, Jinsheng ^{[1
,2
,5
]}

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[3] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China

[4] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China

[5] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

SCIENCE BULLETIN | 2018年 / 63卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Dirac nodal-line semimetal; Magnetoresistance; Berry phase; Quantum oscillations; DFT calculations; Chiral anomaly; NONSATURATING MAGNETORESISTANCE; ULTRAHIGH MOBILITY; DISCOVERY; FERMIONS; NODES;

D O I：

10.1016/j.scib.2018.04.011

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Dirac nodal-line semimetals with the linear bands crossing along a line or loop, represent a new topological state of matter. Here, by carrying out magnetotransport measurements and performing first-principle calculations, we demonstrate that such a state has been realized in high-quality single crystals of SrAs3. We obtain the nontrivial pi Berry phase by analysing the Shubnikov-de Haas quantum oscillations. We also observe a robust negative longitudinal magnetoresistance induced by the chiral anomaly. Accompanying first-principles calculations identifies that a single hole pocket enclosing the loop nodes is responsible for these observations. (C) 2018 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.

引用

页码：535 / 541

页数：7

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