Magnetic and noncentrosymmetric Weyl fermion semimetals in the R AlGe family of compounds ( R = rare earth )
Abstract
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.
- Authors:
-
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- 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)
- Publication Date:
- Research Org.:
- Princeton Univ., NJ (United States); Northeastern Univ., Boston, MA (United States)
- Sponsoring Org.:
- 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
- OSTI Identifier:
- 1540777
- Alternate Identifier(s):
- OSTI ID: 1416217
- 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
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 97; Journal Issue: 4; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ferromagnetism; first-principles calculations; topological materials; topological phases of matter
Citation Formats
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, and Hasan, M. Zahid. Magnetic and noncentrosymmetric Weyl fermion semimetals in the RAlGe family of compounds ( R=rareearth ). United States: N. p., 2018.
Web. doi:10.1103/physrevb.97.041104.
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. Magnetic and noncentrosymmetric Weyl fermion semimetals in the RAlGe family of compounds ( R=rareearth ). United States. https://doi.org/10.1103/physrevb.97.041104
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, and Hasan, M. Zahid. Tue .
"Magnetic and noncentrosymmetric Weyl fermion semimetals in the RAlGe family of compounds ( R=rareearth )". United States. https://doi.org/10.1103/physrevb.97.041104. https://www.osti.gov/servlets/purl/1540777.
@article{osti_1540777,
title = {Magnetic and noncentrosymmetric Weyl fermion semimetals in the RAlGe family of compounds ( R=rareearth )},
author = {Chang, Guoqing and Singh, Bahadur and Xu, Su-Yang and Bian, Guang and Huang, Shin-Ming and Hsu, Chuang-Han and Belopolski, Ilya and Alidoust, Nasser and Sanchez, Daniel S. and Zheng, Hao and Lu, Hong and Zhang, Xiao and Bian, Yi and Chang, Tay-Rong and Jeng, Horng-Tay and Bansil, Arun and Hsu, Han and Jia, Shuang and Neupert, Titus and Lin, Hsin and Hasan, M. Zahid},
abstractNote = {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.},
doi = {10.1103/physrevb.97.041104},
journal = {Physical Review. B},
number = 4,
volume = 97,
place = {United States},
year = {Tue Jan 09 00:00:00 EST 2018},
month = {Tue Jan 09 00:00:00 EST 2018}
}
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