Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides
Based on first-principle calculations, we show that a family of nonmagnetic materials including TaAs, TaP, NbAs, and NbP are Weyl semimetals (WSM) without inversion centers. We find twelve pairs of Weyl points in the whole Brillouin zone (BZ) for each of them. In the absence of spin-orbit coupling (...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2015
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| Online Access: | http://hdl.handle.net/1721.1/96148 https://orcid.org/0000-0002-9236-7410 |
| _version_ | 1811069247090065408 |
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| author | Weng, Hongming Fang, Chen Fang, Zhong Bernevig, B. Andrei Dai, Xi |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Weng, Hongming Fang, Chen Fang, Zhong Bernevig, B. Andrei Dai, Xi |
| author_sort | Weng, Hongming |
| collection | MIT |
| description | Based on first-principle calculations, we show that a family of nonmagnetic materials including TaAs, TaP, NbAs, and NbP are Weyl semimetals (WSM) without inversion centers. We find twelve pairs of Weyl points in the whole Brillouin zone (BZ) for each of them. In the absence of spin-orbit coupling (SOC), band inversions in mirror-invariant planes lead to gapless nodal rings in the energy-momentum dispersion. The strong SOC in these materials then opens full gaps in the mirror planes, generating nonzero mirror Chern numbers and Weyl points off the mirror planes. The resulting surface-state Fermi arc structures on both (001) and (100) surfaces are also obtained, and they show interesting shapes, pointing to fascinating playgrounds for future experimental studies. |
| first_indexed | 2024-09-23T08:08:03Z |
| format | Article |
| id | mit-1721.1/96148 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:08:03Z |
| publishDate | 2015 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/961482022-09-30T07:46:41Z Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides Weng, Hongming Fang, Chen Fang, Zhong Bernevig, B. Andrei Dai, Xi Massachusetts Institute of Technology. Department of Physics Fang, Chen Based on first-principle calculations, we show that a family of nonmagnetic materials including TaAs, TaP, NbAs, and NbP are Weyl semimetals (WSM) without inversion centers. We find twelve pairs of Weyl points in the whole Brillouin zone (BZ) for each of them. In the absence of spin-orbit coupling (SOC), band inversions in mirror-invariant planes lead to gapless nodal rings in the energy-momentum dispersion. The strong SOC in these materials then opens full gaps in the mirror planes, generating nonzero mirror Chern numbers and Weyl points off the mirror planes. The resulting surface-state Fermi arc structures on both (001) and (100) surfaces are also obtained, and they show interesting shapes, pointing to fascinating playgrounds for future experimental studies. National Natural Science Foundation (China) National Basic Research Program of China (973 Program) (2011CBA00108) National Basic Research Program of China (973 Program) (2013CB921700) Chinese Academy of Sciences. Strategic Priorty Research Program (B) (XDB07020100) 2015-03-24T16:13:58Z 2015-03-24T16:13:58Z 2015-03 2015-01 2015-03-17T22:00:03Z Article http://purl.org/eprint/type/JournalArticle 2160-3308 http://hdl.handle.net/1721.1/96148 Weng, Hongming et al. “Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides.” Physical Review X 5.1 (March 2015) https://orcid.org/0000-0002-9236-7410 en http://dx.doi.org/10.1103/PhysRevX.5.011029 Physical Review X Creative Commons Attribution http://creativecommons.org/licenses/by/3.0 authors application/pdf American Physical Society American Physical Society |
| spellingShingle | Weng, Hongming Fang, Chen Fang, Zhong Bernevig, B. Andrei Dai, Xi Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides |
| title | Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides |
| title_full | Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides |
| title_fullStr | Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides |
| title_full_unstemmed | Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides |
| title_short | Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides |
| title_sort | weyl semimetal phase in noncentrosymmetric transition metal monophosphides |
| url | http://hdl.handle.net/1721.1/96148 https://orcid.org/0000-0002-9236-7410 |
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