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Pairing in a dry Fermi sea
In the traditional Bardeen–Cooper–Schrieffer theory of superconductivity, the amplitude for the propagation of a pair of electrons with momentum k and −k has a log singularity as the temperature decreases. This so-called Cooper instability arises from the presence of an electron Fermi sea. It means...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4915029/ https://www.ncbi.nlm.nih.gov/pubmed/27312569 http://dx.doi.org/10.1038/ncomms11875 |
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author | Maier, T. A Staar, P. Mishra, V. Chatterjee, U. Campuzano, J. C. Scalapino, D. J. |
author_facet | Maier, T. A Staar, P. Mishra, V. Chatterjee, U. Campuzano, J. C. Scalapino, D. J. |
author_sort | Maier, T. A |
collection | PubMed |
description | In the traditional Bardeen–Cooper–Schrieffer theory of superconductivity, the amplitude for the propagation of a pair of electrons with momentum k and −k has a log singularity as the temperature decreases. This so-called Cooper instability arises from the presence of an electron Fermi sea. It means that an attractive interaction, no matter how weak, will eventually lead to a pairing instability. However, in the pseudogap regime of the cuprate superconductors, where parts of the Fermi surface are destroyed, this log singularity is suppressed, raising the question of how pairing occurs in the absence of a Fermi sea. Here we report Hubbard model numerical results and the analysis of angular-resolved photoemission experiments on a cuprate superconductor. In contrast to the traditional theory, we find that in the pseudogap regime the pairing instability arises from an increase in the strength of the spin–fluctuation pairing interaction as the temperature decreases rather than the Cooper log instability. |
format | Online Article Text |
id | pubmed-4915029 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-49150292016-06-29 Pairing in a dry Fermi sea Maier, T. A Staar, P. Mishra, V. Chatterjee, U. Campuzano, J. C. Scalapino, D. J. Nat Commun Article In the traditional Bardeen–Cooper–Schrieffer theory of superconductivity, the amplitude for the propagation of a pair of electrons with momentum k and −k has a log singularity as the temperature decreases. This so-called Cooper instability arises from the presence of an electron Fermi sea. It means that an attractive interaction, no matter how weak, will eventually lead to a pairing instability. However, in the pseudogap regime of the cuprate superconductors, where parts of the Fermi surface are destroyed, this log singularity is suppressed, raising the question of how pairing occurs in the absence of a Fermi sea. Here we report Hubbard model numerical results and the analysis of angular-resolved photoemission experiments on a cuprate superconductor. In contrast to the traditional theory, we find that in the pseudogap regime the pairing instability arises from an increase in the strength of the spin–fluctuation pairing interaction as the temperature decreases rather than the Cooper log instability. Nature Publishing Group 2016-06-17 /pmc/articles/PMC4915029/ /pubmed/27312569 http://dx.doi.org/10.1038/ncomms11875 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Maier, T. A Staar, P. Mishra, V. Chatterjee, U. Campuzano, J. C. Scalapino, D. J. Pairing in a dry Fermi sea |
title | Pairing in a dry Fermi sea |
title_full | Pairing in a dry Fermi sea |
title_fullStr | Pairing in a dry Fermi sea |
title_full_unstemmed | Pairing in a dry Fermi sea |
title_short | Pairing in a dry Fermi sea |
title_sort | pairing in a dry fermi sea |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4915029/ https://www.ncbi.nlm.nih.gov/pubmed/27312569 http://dx.doi.org/10.1038/ncomms11875 |
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