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

M. Horio; T. Adachi; Y. Mori; A. Takahashi; T. Yoshida; H. Suzuki; L. C.C. Ambolode; K. Okazaki; K. Ono; H. Kumigashira; H. Anzai; M. Arita; H. Namatame; M. Taniguchi; D. Ootsuki; K. Sawada; M. Takahashi; T. Mizokawa; Y. Koike; A. Fujimori

doi:10.1038/ncomms10567

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

M. Horio^*, T. Adachi, Y. Mori, A. Takahashi, T. Yoshida, H. Suzuki, L. C.C. Ambolode, K. Okazaki, K. Ono, H. Kumigashira, H. Anzai, M. Arita, H. Namatame, M. Taniguchi, D. Ootsuki, K. Sawada, M. Takahashi, T. Mizokawa, Y. Koike, A. Fujimori

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

68 Citations (Scopus)

Abstract

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, Pr_1.3-xLa_0.7Ce_xCuO₄ (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.

Original language	English
Article number	10567
Journal	Nature communications
Volume	7
DOIs	https://doi.org/10.1038/ncomms10567
Publication status	Published - 2016 Feb 4
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
Physics and Astronomy(all)

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10.1038/ncomms10567

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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. (2016). Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing. Nature communications, 7, Article 10567. https://doi.org/10.1038/ncomms10567

Horio, M, Adachi, T, Mori, Y, Takahashi, A, Yoshida, T, Suzuki, H, Ambolode, LCC, 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 2016, 'Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing', Nature communications, vol. 7, 10567. https://doi.org/10.1038/ncomms10567

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title = "Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing",

abstract = "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.",

author = "M. Horio and T. Adachi and Y. Mori and A. Takahashi and T. Yoshida and H. Suzuki and Ambolode, {L. C.C.} and K. Okazaki and K. Ono and H. Kumigashira and H. Anzai and M. Arita and H. Namatame and M. Taniguchi and D. Ootsuki and K. Sawada and M. Takahashi and T. Mizokawa and Y. Koike and A. Fujimori",

note = "Funding Information: Fruitful discussion with M. Ogata, C.M. Varma and T. Saha-Dasgupta is gratefully acknowledged. ARPES experiments were performed at KEK-PF (proposal nos. 2012G075, 2014G177 and 2012S2-001) and HiSOR (proposal nos. 12-A-20 and 14-A-13). This work was supported by Grants-in-Aid for Scientific Research on Innovative Areas {\textquoteleft}Frontier of Materials, Life and Particle Science Explored by Ultra Slow Muon Microscope{\textquoteright} and {\textquoteleft}Materials Design through Computics{\textquoteright} from MEXT, Japan and JSPS KAKENHI grant no. 15H02109. Publisher Copyright: {\textcopyright} 2016, Nature Publishing Group. All rights reserved.",

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T1 - Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing

AU - Horio, M.

AU - Adachi, T.

AU - Mori, Y.

AU - Takahashi, A.

AU - Yoshida, T.

AU - Suzuki, H.

AU - Ambolode, L. C.C.

AU - Okazaki, K.

AU - Ono, K.

AU - Kumigashira, H.

AU - Anzai, H.

AU - Arita, M.

AU - Namatame, H.

AU - Taniguchi, M.

AU - Ootsuki, D.

AU - Sawada, K.

AU - Takahashi, M.

AU - Mizokawa, T.

AU - Koike, Y.

AU - Fujimori, A.

N1 - Funding Information: Fruitful discussion with M. Ogata, C.M. Varma and T. Saha-Dasgupta is gratefully acknowledged. ARPES experiments were performed at KEK-PF (proposal nos. 2012G075, 2014G177 and 2012S2-001) and HiSOR (proposal nos. 12-A-20 and 14-A-13). This work was supported by Grants-in-Aid for Scientific Research on Innovative Areas ‘Frontier of Materials, Life and Particle Science Explored by Ultra Slow Muon Microscope’ and ‘Materials Design through Computics’ from MEXT, Japan and JSPS KAKENHI grant no. 15H02109. Publisher Copyright: © 2016, Nature Publishing Group. All rights reserved.

PY - 2016/2/4

Y1 - 2016/2/4

N2 - 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.

AB - 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.

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

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