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Title: A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class
Authors: Huang, S.-M
Xu, S.-Y
Belopolski, I
Lee, C.-C 
Chang, G
Wang, B 
Alidoust, N
Bian, G
Neupane, M
Zhang, C
Jia, S
Bansil, A 
Lin, H 
Hasan, M.Z
Keywords: monopnictide
transition element
unclassified drug
chemical composition
experimental study
fundamental particle
magnetic field
particle motion
quantum mechanics
transition element
chemical composition
clinical classification
clinical feature
crystal structure
elementary particle
fermi arcs
membrane structure
phase transition
physical parameters
quantum chemistry
surface property
weyl fermion
Issue Date: 2015
Publisher: Nature Publishing Group
Citation: Huang, S.-M, Xu, S.-Y, Belopolski, I, Lee, C.-C, Chang, G, Wang, B, Alidoust, N, Bian, G, Neupane, M, Zhang, C, Jia, S, Bansil, A, Lin, H, Hasan, M.Z (2015). A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class. Nature Communications 6 : 7373. ScholarBank@NUS Repository.
Abstract: Weyl fermions are massless chiral fermions that play an important role in quantum field theory but have never been observed as fundamental particles. A Weyl semimetal is an unusual crystal that hosts Weyl fermions as quasiparticle excitations and features Fermi arcs on its surface. Such a semimetal not only provides a condensed matter realization of the anomalies in quantum field theories but also demonstrates the topological classification beyond the gapped topological insulators. Here, we identify a topological Weyl semimetal state in the transition metal monopnictide materials class. Our first-principles calculations on TaAs reveal its bulk Weyl fermion cones and surface Fermi arcs. Our results show that in the TaAs-type materials the Weyl semimetal state does not depend on fine-tuning of chemical composition or magnetic order, which opens the door for the experimental realization of Weyl semimetals and Fermi arc surface states in real materials. © 2015 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Communications
ISSN: 20411723
DOI: 10.1038/ncomms8373
Appears in Collections:Staff Publications

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