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Point nodes persisting far beyond T(c) in Bi2212

In contrast to a complex feature of antinodal state, suffering from competing orders, the pairing gap of cuprates is obtained in the nodal region, which therefore holds the key to the superconducting mechanism. One of the biggest question is whether the point nodal state as a hallmark of d-wave pair...

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Autores principales: Kondo, Takeshi, Malaeb, W., Ishida, Y., Sasagawa, T., Sakamoto, H., Takeuchi, Tsunehiro, Tohyama, T., Shin, S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4510699/
https://www.ncbi.nlm.nih.gov/pubmed/26158431
http://dx.doi.org/10.1038/ncomms8699
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author Kondo, Takeshi
Malaeb, W.
Ishida, Y.
Sasagawa, T.
Sakamoto, H.
Takeuchi, Tsunehiro
Tohyama, T.
Shin, S.
author_facet Kondo, Takeshi
Malaeb, W.
Ishida, Y.
Sasagawa, T.
Sakamoto, H.
Takeuchi, Tsunehiro
Tohyama, T.
Shin, S.
author_sort Kondo, Takeshi
collection PubMed
description In contrast to a complex feature of antinodal state, suffering from competing orders, the pairing gap of cuprates is obtained in the nodal region, which therefore holds the key to the superconducting mechanism. One of the biggest question is whether the point nodal state as a hallmark of d-wave pairing collapses at T(c) like the BCS-type superconductors, or it instead survives above T(c) turning into the preformed pair state. A difficulty in this issue comes from the small magnitude of the nodal gap, which has been preventing experimentalists from solving it. Here we use a laser ARPES capable of ultrahigh-energy resolution, and detect the point nodes surviving far beyond T(c) in Bi2212. By tracking the temperature evolution of spectra, we reveal that the superconductivity occurs when the pair-breaking rate is suppressed smaller than the single-particle scattering rate on cooling, which governs the value of T(c) in cuprates.
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spelling pubmed-45106992015-07-28 Point nodes persisting far beyond T(c) in Bi2212 Kondo, Takeshi Malaeb, W. Ishida, Y. Sasagawa, T. Sakamoto, H. Takeuchi, Tsunehiro Tohyama, T. Shin, S. Nat Commun Article In contrast to a complex feature of antinodal state, suffering from competing orders, the pairing gap of cuprates is obtained in the nodal region, which therefore holds the key to the superconducting mechanism. One of the biggest question is whether the point nodal state as a hallmark of d-wave pairing collapses at T(c) like the BCS-type superconductors, or it instead survives above T(c) turning into the preformed pair state. A difficulty in this issue comes from the small magnitude of the nodal gap, which has been preventing experimentalists from solving it. Here we use a laser ARPES capable of ultrahigh-energy resolution, and detect the point nodes surviving far beyond T(c) in Bi2212. By tracking the temperature evolution of spectra, we reveal that the superconductivity occurs when the pair-breaking rate is suppressed smaller than the single-particle scattering rate on cooling, which governs the value of T(c) in cuprates. Nature Pub. Group 2015-07-09 /pmc/articles/PMC4510699/ /pubmed/26158431 http://dx.doi.org/10.1038/ncomms8699 Text en Copyright © 2015, 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
Kondo, Takeshi
Malaeb, W.
Ishida, Y.
Sasagawa, T.
Sakamoto, H.
Takeuchi, Tsunehiro
Tohyama, T.
Shin, S.
Point nodes persisting far beyond T(c) in Bi2212
title Point nodes persisting far beyond T(c) in Bi2212
title_full Point nodes persisting far beyond T(c) in Bi2212
title_fullStr Point nodes persisting far beyond T(c) in Bi2212
title_full_unstemmed Point nodes persisting far beyond T(c) in Bi2212
title_short Point nodes persisting far beyond T(c) in Bi2212
title_sort point nodes persisting far beyond t(c) in bi2212
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4510699/
https://www.ncbi.nlm.nih.gov/pubmed/26158431
http://dx.doi.org/10.1038/ncomms8699
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