Tri-Dirac surface modes in topological superconductors
We propose a new type of topological surface modes having cubic dispersion in three-dimensional topological superconductors. Lower order dispersions are prohibited by the threefold rotational symmetry and time-reversal symmetry. Cooper pairing in the bulk changes sign under improper rotations, akin...
| 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/1721.1/96720 https://orcid.org/0000-0002-9236-7410 |
| _version_ | 1826208346094436352 |
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| author | Fang, Chen Bernevig, B. Andrei Gilbert, Matthew J. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Fang, Chen Bernevig, B. Andrei Gilbert, Matthew J. |
| author_sort | Fang, Chen |
| collection | MIT |
| description | We propose a new type of topological surface modes having cubic dispersion in three-dimensional topological superconductors. Lower order dispersions are prohibited by the threefold rotational symmetry and time-reversal symmetry. Cooper pairing in the bulk changes sign under improper rotations, akin to [superscript 3]He-B. The surface manifestations are a divergent surface density of states at the Fermi level and isospins that rotate three times as they circle the origin in momentum space. We propose that Heusler alloys with band inversion are candidate materials to harbor the novel topological superconductivity. |
| first_indexed | 2024-09-23T14:04:19Z |
| format | Article |
| id | mit-1721.1/96720 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:04:19Z |
| publishDate | 2015 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/967202022-10-01T18:58:45Z Tri-Dirac surface modes in topological superconductors Fang, Chen Bernevig, B. Andrei Gilbert, Matthew J. Massachusetts Institute of Technology. Department of Physics Fang, Chen We propose a new type of topological surface modes having cubic dispersion in three-dimensional topological superconductors. Lower order dispersions are prohibited by the threefold rotational symmetry and time-reversal symmetry. Cooper pairing in the bulk changes sign under improper rotations, akin to [superscript 3]He-B. The surface manifestations are a divergent surface density of states at the Fermi level and isospins that rotate three times as they circle the origin in momentum space. We propose that Heusler alloys with band inversion are candidate materials to harbor the novel topological superconductivity. United States. Office of Naval Research (Grant ONR-N0014-11-1-0728) United States. Defense Advanced Research Projects Agency (Grant DARPA-N66001-11-1-4110) 2015-04-23T12:35:31Z 2015-04-23T12:35:31Z 2015-04 2015-04 2015-04-20T22:00:09Z Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/96720 Fang, Chen, B. Andrei Bernevig, and Matthew J. Gilbert. "Tri-Dirac surface modes in topological superconductors." Phys. Rev. B 91, 165421 (April 2015). © 2015 American Physical Society https://orcid.org/0000-0002-9236-7410 en http://dx.doi.org/10.1103/PhysRevB.91.165421 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Fang, Chen Bernevig, B. Andrei Gilbert, Matthew J. Tri-Dirac surface modes in topological superconductors |
| title | Tri-Dirac surface modes in topological superconductors |
| title_full | Tri-Dirac surface modes in topological superconductors |
| title_fullStr | Tri-Dirac surface modes in topological superconductors |
| title_full_unstemmed | Tri-Dirac surface modes in topological superconductors |
| title_short | Tri-Dirac surface modes in topological superconductors |
| title_sort | tri dirac surface modes in topological superconductors |
| url | http://hdl.handle.net/1721.1/96720 https://orcid.org/0000-0002-9236-7410 |
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