Dirac semimetal and topological phase transitions in A3Bi (A = Na, K, Rb)

被引：1692

作者：

Wang, Zhijun ^{[1
,2
]}

Sun, Yan ^{[3
]}

Chen, Xing-Qiu ^{[3
]}

Franchini, Cesare ^{[3
]}

Xu, Gang ^{[1
,2
]}

Weng, Hongming ^{[1
,2
]}

Dai, Xi ^{[1
,2
]}

Fang, Zhong ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 19期

关键词：

ELECTRONIC-STRUCTURE; INSULATOR; CONE; HALL;

D O I：

10.1103/PhysRevB.85.195320

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three-dimensional (3D) Dirac point, where two Weyl points overlap in momentum space, is usually unstable and hard to realize. Here we show, based on the first-principles calculations and effective model analysis, that crystalline A(3)Bi (A = Na, K, Rb) are Dirac semimetals with bulk 3D Dirac points protected by crystal symmetry. They possess nontrivial Fermi arcs on the surfaces and can be driven into various topologically distinct phases by explicit breaking of symmetries. Giant diamagnetism, linear quantum magnetoresistance, and quantum spin Hall effect will be expected for such compounds.

引用

页数：5

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