Odd-parity topological superconductor with nematic order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3]
Cu[subscript x] Bi[subscript 2] Se[subscript 3] was recently proposed as a promising candidate for time-reversal-invariant topological superconductors. In this work, we argue that the unusual anisotropy of the Knight shift observed by Zheng and co-workers (unpublished), taken together with specific...
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| Format: | Article |
| Language: | English |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/90431 https://orcid.org/0000-0002-8803-1017 |
| _version_ | 1826192363868913664 |
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| author | Fu, Liang |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Fu, Liang |
| author_sort | Fu, Liang |
| collection | MIT |
| description | Cu[subscript x] Bi[subscript 2] Se[subscript 3] was recently proposed as a promising candidate for time-reversal-invariant topological superconductors. In this work, we argue that the unusual anisotropy of the Knight shift observed by Zheng and co-workers (unpublished), taken together with specific heat measurements, provides strong support for an unconventional odd-parity pairing in the two-dimensional E[subscript u] representation of the D[subscript 3d] crystal point group, which spontaneously breaks the threefold rotational symmetry of the crystal, leading to a subsidiary nematic order. We predict that the spin-orbit interaction associated with hexagonal warping plays a crucial role in pinning the two-component order parameter and makes the superconducting state generically fully gapped, leading to a topological superconductor. Experimental signatures of the E[subscript u] pairing related to the nematic order are discussed. |
| first_indexed | 2024-09-23T09:10:51Z |
| format | Article |
| id | mit-1721.1/90431 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:10:51Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/904312022-09-26T10:56:10Z Odd-parity topological superconductor with nematic order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3] Fu, Liang Massachusetts Institute of Technology. Department of Physics Fu, Liang Cu[subscript x] Bi[subscript 2] Se[subscript 3] was recently proposed as a promising candidate for time-reversal-invariant topological superconductors. In this work, we argue that the unusual anisotropy of the Knight shift observed by Zheng and co-workers (unpublished), taken together with specific heat measurements, provides strong support for an unconventional odd-parity pairing in the two-dimensional E[subscript u] representation of the D[subscript 3d] crystal point group, which spontaneously breaks the threefold rotational symmetry of the crystal, leading to a subsidiary nematic order. We predict that the spin-orbit interaction associated with hexagonal warping plays a crucial role in pinning the two-component order parameter and makes the superconducting state generically fully gapped, leading to a topological superconductor. Experimental signatures of the E[subscript u] pairing related to the nematic order are discussed. United States. Dept. of Energy. Division of Materials Sciences and Engineering (Award DE-SC0010526) 2014-09-29T15:21:41Z 2014-09-29T15:21:41Z 2014-09 2014-08 2014-09-26T22:00:07Z Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/90431 Fu, Liang. “Odd-Parity Topological Superconductor with Nematic Order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3].” Phys. Rev. B 90, no. 10 (September 2014). © 2014 American Physical Society https://orcid.org/0000-0002-8803-1017 en http://dx.doi.org/10.1103/PhysRevB.90.100509 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 | Fu, Liang Odd-parity topological superconductor with nematic order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3] |
| title | Odd-parity topological superconductor with nematic order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3] |
| title_full | Odd-parity topological superconductor with nematic order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3] |
| title_fullStr | Odd-parity topological superconductor with nematic order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3] |
| title_full_unstemmed | Odd-parity topological superconductor with nematic order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3] |
| title_short | Odd-parity topological superconductor with nematic order: Application to Cu[subscript x] Bi[subscript 2] Se[subscript 3] |
| title_sort | odd parity topological superconductor with nematic order application to cu subscript x bi subscript 2 se subscript 3 |
| url | http://hdl.handle.net/1721.1/90431 https://orcid.org/0000-0002-8803-1017 |
| work_keys_str_mv | AT fuliang oddparitytopologicalsuperconductorwithnematicorderapplicationtocusubscriptxbisubscript2sesubscript3 |