Magnetic and noncentrosymmetric Weyl fermion semimetals in the RAlGe family of compounds ( R=rareearth )

Chang, Guoqing; Singh, Bahadur; Xu, Su-Yang; Bian, Guang; Huang, Shin-Ming; Hsu, Chuang-Han; Belopolski, Ilya; Alidoust, Nasser; Sanchez, Daniel S.; Zheng, Hao; Lu, Hong; Zhang, Xiao; Bian, Yi; Chang, Tay-Rong; Jeng, Horng-Tay; Bansil, Arun; Hsu, Han; Jia, Shuang; Neupert, Titus; Lin, Hsin; Hasan, M. Zahid

doi:10.1103/physrevb.97.041104

Title: Magnetic and noncentrosymmetric Weyl fermion semimetals in the R AlGe family of compounds ( R = rare earth )

Journal Article · Tue Jan 09 00:00:00 EST 2018 · Physical Review. B

DOI:https://doi.org/10.1103/physrevb.97.041104· OSTI ID:1540777

Chang, Guoqing ^[1]; Singh, Bahadur ^[1]; Xu, Su-Yang ^[2]; Bian, Guang ^[3]; Huang, Shin-Ming ^[4]; Hsu, Chuang-Han ^[1]; Belopolski, Ilya ^[2]; Alidoust, Nasser ^[2]; Sanchez, Daniel S. ^[2]; Zheng, Hao ^[5]; Lu, Hong ^[6]; Zhang, Xiao ^[6]; Bian, Yi ^[6]; Chang, Tay-Rong ^[7]; Jeng, Horng-Tay ^[8]; Bansil, Arun ^[9]; Hsu, Han ^[10]; Jia, Shuang ^[11]; Neupert, Titus ^[12]; Lin, Hsin ^[1] more »

National University of Singapore (Singapore)
Princeton University, NJ (United States)
Princeton University, NJ (United States); University of Missouri, Columbia, MO (United States)
National Sun Yat-sen University, Kaohsiung (Taiwan)
Princeton University, NJ (United States); Shanghai Jiao Tong University, Shanghai (China)
Peking University, Beijing (China)
National Tsing Hua University, Hsinchu (Taiwan); National Cheng Kung University, Tainan (Taiwan)
National Tsing Hua University, Hsinchu (Taiwan); Institute of Physics, Academia Sinica, Taipei (Taiwan)
Northeastern University, Boston, MA (United States)
National Central University, Jhongli City (Taiwan)
Peking University, Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Princeton University, NJ (United States); University of Zurich (Switzerland)

Weyl semimetals are novel topological conductors that host Weyl fermions as emergent quasiparticles. In this Rapid Communication, we propose a new type of Weyl 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 the Weyl nodes in k space. Moreover, RAlGe offers remarkable tunability, which covers all varieties of Weyl semimetals including type I, type II, inversion breaking, and time-reversal breaking, depending on a suitable choice of the rare-earth elements. As such, the unique noncentrosymmetric and ferromagnetic Weyl semimetal state in RAlGe enables the generation of spin currents.

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Research Organization:: Princeton Univ., NJ (United States); Northeastern Univ., Boston, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation; National Research Foundation; National Science Foundation of China; National Basic Research Program of China; Swiss National Science Foundation (SNSF); Ministry of Science and Technology in Taiwan; Ministry of Science and Technology; National Cheng Kung University

Grant/Contract Number:: FG02-05ER46200; FG02-07ER46352; AC02-05CH11231; NRF-NRFF2013-03; 11774007; 2014CB239302; 200021-169061; MOST105-2112-M110-014- MY3; DOE/BES DE-FG-02-05ER46200

OSTI ID:: 1540777

Alternate ID(s):: OSTI ID: 1416217

Journal Information:: Physical Review. B, Vol. 97, Issue 4; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 112 works

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Title: Magnetic and noncentrosymmetric Weyl fermion semimetals in the R AlGe family of compounds ( R = rare earth )

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