Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing

In the hole-doped cuprates, a small number of carriers suppresses antiferromagnetism and induces superconductivity. In the electron-doped cuprates, on the other hand, superconductivity appears only in a narrow window of high-doped Ce concentration after reduction annealing, and strong antiferromagne...

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Main Authors:	Horio, M., Adachi, T., Mori, Y., Takahashi, A., Yoshida, T., Suzuki, H., Ambolode, L. C. C., Okazaki, K., Ono, K., Kumigashira, H., Anzai, H., Arita, M., Namatame, H., Taniguchi, M., Ootsuki, D., Sawada, K., Takahashi, M., Mizokawa, T., Koike, Y., Fujimori, A.
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4743021/

id	pubmed-4743021
recordtype	oai_dc
spelling	pubmed-47430212016-03-04 Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing Horio, M. Adachi, T. Mori, Y. Takahashi, A. Yoshida, T. Suzuki, H. Ambolode, L. C. C. Okazaki, K. Ono, K. Kumigashira, H. Anzai, H. Arita, M. Namatame, H. Taniguchi, M. Ootsuki, D. Sawada, K. Takahashi, M. Mizokawa, T. Koike, Y. Fujimori, A. Article In the hole-doped cuprates, a small number of carriers suppresses antiferromagnetism and induces superconductivity. In the electron-doped cuprates, on the other hand, superconductivity appears only in a narrow window of high-doped Ce concentration after reduction annealing, and strong antiferromagnetic correlation persists in the superconducting phase. Recently, Pr1.3−xLa0.7CexCuO4 (PLCCO) bulk single crystals annealed by a protect annealing method showed a high critical temperature of around 27 K for small Ce content down to 0.05. Here, by angle-resolved photoemission spectroscopy measurements of PLCCO crystals, we observed a sharp quasi-particle peak on the entire Fermi surface without signature of an antiferromagnetic pseudogap unlike all the previous work, indicating a dramatic reduction of antiferromagnetic correlation length and/or of magnetic moments. The superconducting state was found to extend over a wide electron concentration range. The present results fundamentally challenge the long-standing picture on the electronic structure in the electron-doped regime. Nature Publishing Group 2016-02-04 /pmc/articles/PMC4743021/ /pubmed/26843063 http://dx.doi.org/10.1038/ncomms10567 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/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Horio, M. Adachi, T. Mori, Y. Takahashi, A. Yoshida, T. Suzuki, H. Ambolode, L. C. C. Okazaki, K. Ono, K. Kumigashira, H. Anzai, H. Arita, M. Namatame, H. Taniguchi, M. Ootsuki, D. Sawada, K. Takahashi, M. Mizokawa, T. Koike, Y. Fujimori, A.
spellingShingle	Horio, M. Adachi, T. Mori, Y. Takahashi, A. Yoshida, T. Suzuki, H. Ambolode, L. C. C. Okazaki, K. Ono, K. Kumigashira, H. Anzai, H. Arita, M. Namatame, H. Taniguchi, M. Ootsuki, D. Sawada, K. Takahashi, M. Mizokawa, T. Koike, Y. Fujimori, A. Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing
author_facet	Horio, M. Adachi, T. Mori, Y. Takahashi, A. Yoshida, T. Suzuki, H. Ambolode, L. C. C. Okazaki, K. Ono, K. Kumigashira, H. Anzai, H. Arita, M. Namatame, H. Taniguchi, M. Ootsuki, D. Sawada, K. Takahashi, M. Mizokawa, T. Koike, Y. Fujimori, A.
author_sort	Horio, M.
title	Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing
title_short	Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing
title_full	Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing
title_fullStr	Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing
title_full_unstemmed	Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing
title_sort	suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing
description	In the hole-doped cuprates, a small number of carriers suppresses antiferromagnetism and induces superconductivity. In the electron-doped cuprates, on the other hand, superconductivity appears only in a narrow window of high-doped Ce concentration after reduction annealing, and strong antiferromagnetic correlation persists in the superconducting phase. Recently, Pr1.3−xLa0.7CexCuO4 (PLCCO) bulk single crystals annealed by a protect annealing method showed a high critical temperature of around 27 K for small Ce content down to 0.05. Here, by angle-resolved photoemission spectroscopy measurements of PLCCO crystals, we observed a sharp quasi-particle peak on the entire Fermi surface without signature of an antiferromagnetic pseudogap unlike all the previous work, indicating a dramatic reduction of antiferromagnetic correlation length and/or of magnetic moments. The superconducting state was found to extend over a wide electron concentration range. The present results fundamentally challenge the long-standing picture on the electronic structure in the electron-doped regime.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4743021/
_version_	1613534485849047040

Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing

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