Triple Point Topological Metals
Name
PhysRevX.6.031003.pdf
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1.63 MB
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Adobe PDF
Checksum (MD5)
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Author(s)
Zhu, Ziming
Winkler, Georg W.
Wu, QuanSheng
Li, Ju
Soluyanov, Alexey A.
Date Issued
July 2016
Journal
Physical Review X
Publisher
American Physical Society
Citation
Zhu, Ziming; Winkler, Georg W.; Wu, QuanSheng; Li, Ju and Soluyanov, Alexey A. "Triple Point Topological Metals." Physical Review X 6, 031003 (July 2016): 1-15 © 2016 American Physical Society
Version
Final published version
Abstract
Topologically protected fermionic quasiparticles appear in metals, where band degeneracies occur at the Fermi level, dictated by the band structure topology. While in some metals these quasiparticles are direct analogues of elementary fermionic particles of the relativistic quantum field theory, other metals can have symmetries that give rise to quasiparticles, fundamentally different from those known in high-energy physics. Here, we report on a new type of topological quasiparticles—triple point fermions—realized in metals with symmorphic crystal structure, which host crossings of three bands in the vicinity of the Fermi level protected by point group symmetries. We find two topologically different types of triple point fermions, both distinct from any other topological quasiparticles reported to date. We provide examples of existing materials that host triple point fermions of both types and discuss a variety of physical phenomena associated with these quasiparticles, such as the occurrence of topological surface Fermi arcs, transport anomalies, and topological Lifshitz transitions.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/PhysRevX.6.031003
