Superconductivity with twofold symmetry in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures
Topological superconductors are an interesting and frontier topic in condensed matter physics. In the superconducting state, an order parameter will be established with the basic or subsidiary symmetry of the crystalline lattice. In doped Bi(2)Se(3) or Bi(2)Te(3) with a basic threefold symmetry, it...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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American Association for the Advancement of Science
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5993472/ https://www.ncbi.nlm.nih.gov/pubmed/29888330 http://dx.doi.org/10.1126/sciadv.aat1084 |
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author | Chen, Mingyang Chen, Xiaoyu Yang, Huan Du, Zengyi Wen, Hai-Hu |
author_facet | Chen, Mingyang Chen, Xiaoyu Yang, Huan Du, Zengyi Wen, Hai-Hu |
author_sort | Chen, Mingyang |
collection | PubMed |
description | Topological superconductors are an interesting and frontier topic in condensed matter physics. In the superconducting state, an order parameter will be established with the basic or subsidiary symmetry of the crystalline lattice. In doped Bi(2)Se(3) or Bi(2)Te(3) with a basic threefold symmetry, it was predicted, however, that bulk superconductivity with order parameters of twofold symmetry may exist because of the presence of odd parity. We report the proximity effect–induced superconductivity in the Bi(2)Te(3) thin film on top of the iron-based superconductor FeTe(0.55)Se(0.45). By using the quasiparticle interference technique, we demonstrate clear evidence of twofold symmetry of the superconducting gap. The gap minimum is along one of the main crystalline axes following the so-called Δ(4y) notation. This is also accompanied by the elongated vortex shape mapped out by the density of states within the superconducting gap. Our results provide an easily accessible platform for investigating possible topological superconductivity in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures. |
format | Online Article Text |
id | pubmed-5993472 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-59934722018-06-10 Superconductivity with twofold symmetry in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures Chen, Mingyang Chen, Xiaoyu Yang, Huan Du, Zengyi Wen, Hai-Hu Sci Adv Research Articles Topological superconductors are an interesting and frontier topic in condensed matter physics. In the superconducting state, an order parameter will be established with the basic or subsidiary symmetry of the crystalline lattice. In doped Bi(2)Se(3) or Bi(2)Te(3) with a basic threefold symmetry, it was predicted, however, that bulk superconductivity with order parameters of twofold symmetry may exist because of the presence of odd parity. We report the proximity effect–induced superconductivity in the Bi(2)Te(3) thin film on top of the iron-based superconductor FeTe(0.55)Se(0.45). By using the quasiparticle interference technique, we demonstrate clear evidence of twofold symmetry of the superconducting gap. The gap minimum is along one of the main crystalline axes following the so-called Δ(4y) notation. This is also accompanied by the elongated vortex shape mapped out by the density of states within the superconducting gap. Our results provide an easily accessible platform for investigating possible topological superconductivity in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures. American Association for the Advancement of Science 2018-06-08 /pmc/articles/PMC5993472/ /pubmed/29888330 http://dx.doi.org/10.1126/sciadv.aat1084 Text en Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Chen, Mingyang Chen, Xiaoyu Yang, Huan Du, Zengyi Wen, Hai-Hu Superconductivity with twofold symmetry in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures |
title | Superconductivity with twofold symmetry in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures |
title_full | Superconductivity with twofold symmetry in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures |
title_fullStr | Superconductivity with twofold symmetry in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures |
title_full_unstemmed | Superconductivity with twofold symmetry in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures |
title_short | Superconductivity with twofold symmetry in Bi(2)Te(3)/FeTe(0.55)Se(0.45) heterostructures |
title_sort | superconductivity with twofold symmetry in bi(2)te(3)/fete(0.55)se(0.45) heterostructures |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5993472/ https://www.ncbi.nlm.nih.gov/pubmed/29888330 http://dx.doi.org/10.1126/sciadv.aat1084 |
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