Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃
The recently discovered superconductor CuₓBi₂Se₃ is a candidate for three-dimensional time-reversal-invariant topological superconductors, which are predicted to have robust surface Andreev bound states hosting massless Majorana fermions. In this work, we analytically and numerically find the linear...
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American Physical Society
2012
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Online Access: | http://hdl.handle.net/1721.1/70908 https://orcid.org/0000-0002-8803-1017 https://orcid.org/0000-0001-8187-7266 |
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author | Fu, Liang Hsieh, Timothy Hwa-wei |
author2 | Massachusetts Institute of Technology. Department of Physics |
author_facet | Massachusetts Institute of Technology. Department of Physics Fu, Liang Hsieh, Timothy Hwa-wei |
author_sort | Fu, Liang |
collection | MIT |
description | The recently discovered superconductor CuₓBi₂Se₃ is a candidate for three-dimensional time-reversal-invariant topological superconductors, which are predicted to have robust surface Andreev bound states hosting massless Majorana fermions. In this work, we analytically and numerically find the linearly dispersing Majorana fermions at k=0, which smoothly evolve into a new branch of gapless surface Andreev bound states near the Fermi momentum. The latter is a new type of Andreev bound states resulting from both the nontrivial band structure and the odd-parity pairing symmetry. The tunneling spectra of these surface Andreev bound states agree well with a recent point-contact spectroscopy experiment [ S. Sasaki et al. Phys. Rev. Lett. 107 217001 (2011)] and yield additional predictions for low temperature tunneling and photoemission experiments. |
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id | mit-1721.1/70908 |
institution | Massachusetts Institute of Technology |
language | en_US |
last_indexed | 2024-09-23T10:45:29Z |
publishDate | 2012 |
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spelling | mit-1721.1/709082022-09-30T22:47:06Z Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃ Fu, Liang Hsieh, Timothy Hwa-wei Massachusetts Institute of Technology. Department of Physics Fu, Liang Fu, Liang Hsieh, Timothy Hwa-wei The recently discovered superconductor CuₓBi₂Se₃ is a candidate for three-dimensional time-reversal-invariant topological superconductors, which are predicted to have robust surface Andreev bound states hosting massless Majorana fermions. In this work, we analytically and numerically find the linearly dispersing Majorana fermions at k=0, which smoothly evolve into a new branch of gapless surface Andreev bound states near the Fermi momentum. The latter is a new type of Andreev bound states resulting from both the nontrivial band structure and the odd-parity pairing symmetry. The tunneling spectra of these surface Andreev bound states agree well with a recent point-contact spectroscopy experiment [ S. Sasaki et al. Phys. Rev. Lett. 107 217001 (2011)] and yield additional predictions for low temperature tunneling and photoemission experiments. United States. Dept. of Energy (Grant No. DE-FG02-05ER41360) National Science Foundation (U.S.) (fellowship grant No. 0645960) Harvard University (Society of Fellows) Chinese Academy of Sciences (Institute of Physics) Tsinghua University (Beijing, China) (Institute of Advanced Study) 2012-05-22T19:58:12Z 2012-05-22T19:58:12Z 2012-03 2011-09 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/70908 Hsieh, Timothy, and Liang Fu. “Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃.” Physical Review Letters 108.10 (2012):[5 pages].© 2012 American Physical Society. https://orcid.org/0000-0002-8803-1017 https://orcid.org/0000-0001-8187-7266 en_US http://dx.doi.org/10.1103/PhysRevLett.108.107005 Physical Review Letters 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. application/pdf American Physical Society APS |
spellingShingle | Fu, Liang Hsieh, Timothy Hwa-wei Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃ |
title | Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃ |
title_full | Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃ |
title_fullStr | Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃ |
title_full_unstemmed | Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃ |
title_short | Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuₓBi₂Se₃ |
title_sort | majorana fermions and exotic surface andreev bound states in topological superconductors application to cuₓbi₂se₃ |
url | http://hdl.handle.net/1721.1/70908 https://orcid.org/0000-0002-8803-1017 https://orcid.org/0000-0001-8187-7266 |
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