Triple Point Topological Metals
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, oth...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/110386 https://orcid.org/0000-0002-7841-8058 |
| _version_ | 1826192953405603840 |
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| author | Zhu, Ziming Winkler, Georg W. Wu, QuanSheng Li, Ju Soluyanov, Alexey A. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Zhu, Ziming Winkler, Georg W. Wu, QuanSheng Li, Ju Soluyanov, Alexey A. |
| author_sort | Zhu, Ziming |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T09:31:43Z |
| format | Article |
| id | mit-1721.1/110386 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:31:43Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1103862022-09-26T12:04:01Z Triple Point Topological Metals Zhu, Ziming Winkler, Georg W. Wu, QuanSheng Li, Ju Soluyanov, Alexey A. Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Zhu, Ziming Li, Ju 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. National Science Foundation (U.S.) (DMR-1410636) National Science Foundation (U.S.) (DMR-1120901) 2017-06-30T14:50:48Z 2017-06-30T14:50:48Z 2016-07 2016-05 2016-07-07T22:00:04Z Article http://purl.org/eprint/type/JournalArticle 2160-3308 http://hdl.handle.net/1721.1/110386 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 https://orcid.org/0000-0002-7841-8058 en http://dx.doi.org/10.1103/PhysRevX.6.031003 Physical Review X Creative Commons Attribution http://creativecommons.org/licenses/by/3.0 authors application/pdf American Physical Society American Physical Society |
| spellingShingle | Zhu, Ziming Winkler, Georg W. Wu, QuanSheng Li, Ju Soluyanov, Alexey A. Triple Point Topological Metals |
| title | Triple Point Topological Metals |
| title_full | Triple Point Topological Metals |
| title_fullStr | Triple Point Topological Metals |
| title_full_unstemmed | Triple Point Topological Metals |
| title_short | Triple Point Topological Metals |
| title_sort | triple point topological metals |
| url | http://hdl.handle.net/1721.1/110386 https://orcid.org/0000-0002-7841-8058 |
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