Magnetic and noncentrosymmetricWeyl fermion semimetals in the RAlGe family of compounds (R = rare earth)

被引：168

作者：

Chang, Guoqing ^{[1
,2
,3
]}

Singh, Bahadur ^{[1
,2
,3
]}

Xu, Su-Yang ^{[4
]}

Bian, Guang ^{[4
,5
]}

Huang, Shin-Ming ^{[6
]}

Hsu, Chuang-Han ^{[1
,2
,3
]}

Belopolski, Ilya ^{[4
]}

Alidoust, Nasser ^{[4
]}

Sanchez, Daniel S. ^{[4
]}

Zheng, Hao ^{[4
,7
]}

Lu, Hong ^{[8
]}

Zhang, Xiao ^{[8
]}

Bian, Yi ^{[8
]}

Chang, Tay-Rong ^{[9
,10
]}

Jeng, Horng-Tay ^{[9
,11
]}

Bansil, Arun ^{[12
]}

Hsu, Han ^{[13
]}

Jia, Shuang ^{[8
,14
]}

Neupert, Titus ^{[15
,16
]}

Lin, Hsin ^{[1
,2
,3
]}

Hasan, M. Zahid ^{[4
,17
]}

机构：

[1] Natl Univ Singapore, Ctr Adv Mat 2D, 6 Sci Dr 2, Singapore 117546, Singapore

[2] Natl Univ Singapore, Graphene Res Ctr, 6 Sci Dr 2, Singapore 117546, Singapore

[3] Natl Univ Singapore, Dept Phys, 2 Sci Dr 3, Singapore 117542, Singapore

[4] Princeton Univ, Lab Topol Quantum Matter & Spect B7, Dept Phys, Princeton, NJ 08544 USA

[5] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[6] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan

[7] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China

[8] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing, Peoples R China

[9] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[10] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[11] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[12] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[13] Natl Cent Univ, Dept Phys, Taoyuan 32001, Taiwan

[14] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

[15] Princeton Univ, Princeton Ctr Theoret Sci, Princeton, NJ 08544 USA

[16] Univ Zurich, Dept Phys, Winterthurerstr 190, CH-8057 Zurich, Switzerland

[17] Princeton Univ, Princeton Inst Sci & Technol Mat, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 04期

基金：

美国国家科学基金会; 瑞士国家科学基金会; 新加坡国家研究基金会;

关键词：

WEYL SEMIMETAL; TOPOLOGICAL SEMIMETAL; PHYSICAL-PROPERTIES; ARCS; DISCOVERY; CRYSTAL; SURFACE; INTERFERENCE; METALS; PHASE;

D O I：

10.1103/PhysRevB.97.041104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Weyl semimetals are novel topological conductors that host Weyl fermions as emergent quasiparticles. In this Rapid Communication, we propose a new type ofWeyl semimetal state that breaks both time-reversal symmetry and inversion symmetry in the RAlGe (R = rare-earth) family. Compared to previous predictions of magnetic Weyl semimetal candidates, the prediction of Weyl nodes in RAlGe is more robust and less dependent on the details of the magnetism because the Weyl nodes are generated already by the inversion breaking and the ferromagnetism acts as a simple Zeeman coupling that shifts theWeyl nodes in k space. Moreover, RAlGe offers remarkable tunability, which covers all varieties ofWeyl semimetals including type I, type II, inversion breaking, and time-reversal breaking, depending on a suitable choice of the rare-earth elements. Furthermore, the unique noncentrosymmetric and ferromagnetic Weyl semimetal state in RAlGe enables the generation of spin currents.

引用

页数：7

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