Dirac and Weyl Semimetal in XYBi (X = Ba, Eu; Y = Cu, Ag and Au)

被引：62

作者：

Du, Yongping ^{[1
,2
]}

Wan, Bo ^{[1
,2
]}

Wang, Di ^{[1
,2
]}

Sheng, Li ^{[1
,2
,3
]}

Duan, Chun-Gang ^{[4
]}

Wan, Xiangang ^{[1
,2
,3
]}

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

[4] E China Normal Univ, Minist Educ, Key Lab Polar Mat & Devices, Shanghai 200062, Peoples R China

来源：

SCIENTIFIC REPORTS | 2015年 / 5卷

关键词：

TOPOLOGICAL INSULATORS; FERMION SEMIMETAL; TRANSITION; DISCOVERY; MOBILITY; PHASES; ARCS;

D O I：

10.1038/srep14423

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：

Weyl and Dirac semimetals recently stimulate intense research activities due to their novel properties. Combining first-principles calculations and effective model analysis, we predict that nonmagnetic compounds BaYBi (Y = Au, Ag and Cu) are Dirac semimetals. As for the magnetic compound EuYBi, although the time reversal symmetry is broken, their long-range magnetic ordering cannot split the Dirac point into pairs of Weyl points. However, we propose that partially substitute Eu ions by Ba ions will realize the Weyl semimetal.

引用

页数：8

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