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Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors

A major problem in the field of high-transition temperature (T(c)) superconductivity is the identification of the electronic instabilities near superconductivity. It is known that the iron-based superconductors exhibit antiferromagnetic order, which competes with the superconductivity. However, in t...

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Autores principales: Shimojima, Takahiro, Malaeb, Walid, Nakamura, Asuka, Kondo, Takeshi, Kihou, Kunihiro, Lee, Chul-Ho, Iyo, Akira, Eisaki, Hiroshi, Ishida, Shigeyuki, Nakajima, Masamichi, Uchida, Shin-ichi, Ohgushi, Kenya, Ishizaka, Kyoko, Shin, Shik
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5573309/
https://www.ncbi.nlm.nih.gov/pubmed/28875162
http://dx.doi.org/10.1126/sciadv.1700466
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author Shimojima, Takahiro
Malaeb, Walid
Nakamura, Asuka
Kondo, Takeshi
Kihou, Kunihiro
Lee, Chul-Ho
Iyo, Akira
Eisaki, Hiroshi
Ishida, Shigeyuki
Nakajima, Masamichi
Uchida, Shin-ichi
Ohgushi, Kenya
Ishizaka, Kyoko
Shin, Shik
author_facet Shimojima, Takahiro
Malaeb, Walid
Nakamura, Asuka
Kondo, Takeshi
Kihou, Kunihiro
Lee, Chul-Ho
Iyo, Akira
Eisaki, Hiroshi
Ishida, Shigeyuki
Nakajima, Masamichi
Uchida, Shin-ichi
Ohgushi, Kenya
Ishizaka, Kyoko
Shin, Shik
author_sort Shimojima, Takahiro
collection PubMed
description A major problem in the field of high-transition temperature (T(c)) superconductivity is the identification of the electronic instabilities near superconductivity. It is known that the iron-based superconductors exhibit antiferromagnetic order, which competes with the superconductivity. However, in the nonmagnetic state, there are many aspects of the electronic instabilities that remain unclarified, as represented by the orbital instability and several in-plane anisotropic physical properties. We report a new aspect of the electronic state of the optimally doped iron-based superconductors by using high–energy resolution angle-resolved photoemission spectroscopy. We find spectral evidence for the folded electronic structure suggestive of an antiferroic electronic instability, coexisting with the superconductivity in the nonmagnetic state of Ba(1−x)K(x)Fe(2)As(2). We further establish a phase diagram showing that the antiferroic electronic structure persists in a large portion of the nonmagnetic phase covering the superconducting dome. These results motivate consideration of a key unknown electronic instability, which is necessary for the achievement of high-T(c) superconductivity in the iron-based superconductors.
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spelling pubmed-55733092017-09-05 Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors Shimojima, Takahiro Malaeb, Walid Nakamura, Asuka Kondo, Takeshi Kihou, Kunihiro Lee, Chul-Ho Iyo, Akira Eisaki, Hiroshi Ishida, Shigeyuki Nakajima, Masamichi Uchida, Shin-ichi Ohgushi, Kenya Ishizaka, Kyoko Shin, Shik Sci Adv Research Articles A major problem in the field of high-transition temperature (T(c)) superconductivity is the identification of the electronic instabilities near superconductivity. It is known that the iron-based superconductors exhibit antiferromagnetic order, which competes with the superconductivity. However, in the nonmagnetic state, there are many aspects of the electronic instabilities that remain unclarified, as represented by the orbital instability and several in-plane anisotropic physical properties. We report a new aspect of the electronic state of the optimally doped iron-based superconductors by using high–energy resolution angle-resolved photoemission spectroscopy. We find spectral evidence for the folded electronic structure suggestive of an antiferroic electronic instability, coexisting with the superconductivity in the nonmagnetic state of Ba(1−x)K(x)Fe(2)As(2). We further establish a phase diagram showing that the antiferroic electronic structure persists in a large portion of the nonmagnetic phase covering the superconducting dome. These results motivate consideration of a key unknown electronic instability, which is necessary for the achievement of high-T(c) superconductivity in the iron-based superconductors. American Association for the Advancement of Science 2017-08-25 /pmc/articles/PMC5573309/ /pubmed/28875162 http://dx.doi.org/10.1126/sciadv.1700466 Text en Copyright © 2017 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
Shimojima, Takahiro
Malaeb, Walid
Nakamura, Asuka
Kondo, Takeshi
Kihou, Kunihiro
Lee, Chul-Ho
Iyo, Akira
Eisaki, Hiroshi
Ishida, Shigeyuki
Nakajima, Masamichi
Uchida, Shin-ichi
Ohgushi, Kenya
Ishizaka, Kyoko
Shin, Shik
Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors
title Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors
title_full Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors
title_fullStr Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors
title_full_unstemmed Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors
title_short Antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors
title_sort antiferroic electronic structure in the nonmagnetic superconducting state of the iron-based superconductors
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5573309/
https://www.ncbi.nlm.nih.gov/pubmed/28875162
http://dx.doi.org/10.1126/sciadv.1700466
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