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Superconductivity from the condensation of topological defects in a quantum spin-Hall insulator
The discovery of quantum spin-Hall (QSH) insulators has brought topology to the forefront of condensed matter physics. While a QSH state from spin-orbit coupling can be fully understood in terms of band theory, fascinating many-body effects are expected if it instead results from spontaneous symmetr...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6572839/ https://www.ncbi.nlm.nih.gov/pubmed/31201300 http://dx.doi.org/10.1038/s41467-019-10372-0 |
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author | Liu, Yuhai Wang, Zhenjiu Sato, Toshihiro Hohenadler, Martin Wang, Chong Guo, Wenan Assaad, Fakher F. |
author_facet | Liu, Yuhai Wang, Zhenjiu Sato, Toshihiro Hohenadler, Martin Wang, Chong Guo, Wenan Assaad, Fakher F. |
author_sort | Liu, Yuhai |
collection | PubMed |
description | The discovery of quantum spin-Hall (QSH) insulators has brought topology to the forefront of condensed matter physics. While a QSH state from spin-orbit coupling can be fully understood in terms of band theory, fascinating many-body effects are expected if it instead results from spontaneous symmetry breaking. Here, we introduce a model of interacting Dirac fermions where a QSH state is dynamically generated. Our tuning parameter further allows us to destabilize the QSH state in favour of a superconducting state through proliferation of charge-2e topological defects. This route to superconductivity put forward by Grover and Senthil is an instance of a deconfined quantum critical point (DQCP). Our model offers the possibility to study DQCPs without a second length scale associated with the reduced symmetry between field theory and lattice realization and, by construction, is amenable to large-scale fermion quantum Monte Carlo simulations. |
format | Online Article Text |
id | pubmed-6572839 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-65728392019-06-24 Superconductivity from the condensation of topological defects in a quantum spin-Hall insulator Liu, Yuhai Wang, Zhenjiu Sato, Toshihiro Hohenadler, Martin Wang, Chong Guo, Wenan Assaad, Fakher F. Nat Commun Article The discovery of quantum spin-Hall (QSH) insulators has brought topology to the forefront of condensed matter physics. While a QSH state from spin-orbit coupling can be fully understood in terms of band theory, fascinating many-body effects are expected if it instead results from spontaneous symmetry breaking. Here, we introduce a model of interacting Dirac fermions where a QSH state is dynamically generated. Our tuning parameter further allows us to destabilize the QSH state in favour of a superconducting state through proliferation of charge-2e topological defects. This route to superconductivity put forward by Grover and Senthil is an instance of a deconfined quantum critical point (DQCP). Our model offers the possibility to study DQCPs without a second length scale associated with the reduced symmetry between field theory and lattice realization and, by construction, is amenable to large-scale fermion quantum Monte Carlo simulations. Nature Publishing Group UK 2019-06-14 /pmc/articles/PMC6572839/ /pubmed/31201300 http://dx.doi.org/10.1038/s41467-019-10372-0 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Liu, Yuhai Wang, Zhenjiu Sato, Toshihiro Hohenadler, Martin Wang, Chong Guo, Wenan Assaad, Fakher F. Superconductivity from the condensation of topological defects in a quantum spin-Hall insulator |
title | Superconductivity from the condensation of topological defects in a quantum spin-Hall insulator |
title_full | Superconductivity from the condensation of topological defects in a quantum spin-Hall insulator |
title_fullStr | Superconductivity from the condensation of topological defects in a quantum spin-Hall insulator |
title_full_unstemmed | Superconductivity from the condensation of topological defects in a quantum spin-Hall insulator |
title_short | Superconductivity from the condensation of topological defects in a quantum spin-Hall insulator |
title_sort | superconductivity from the condensation of topological defects in a quantum spin-hall insulator |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6572839/ https://www.ncbi.nlm.nih.gov/pubmed/31201300 http://dx.doi.org/10.1038/s41467-019-10372-0 |
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