Electron-doping effect on Tc in the undoped (Ce-free) superconductor T¤-La1.8Eu0.2CuO4 studied by the fluorine substitution for oxygen

Toshiki Sunohara; Takayuki Kawamata; Kota Shiosaka; Tomohisa Takamatsu; Takashi Noji; Masatsune Kato; Yoji Koike

doi:10.7566/JPSJ.89.014701

Electron-doping effect on T_c in the undoped (Ce-free) superconductor T¤-La_1.8Eu_0.2CuO₄ studied by the fluorine substitution for oxygen

Toshiki Sunohara, Takayuki Kawamata, Kota Shiosaka, Tomohisa Takamatsu, Takashi Noji, Masatsune Kato, Yoji Koike

ENG - Applied Physics

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Abstract

We have succeeded in synthesizing electron-doped polycrystalline bulk samples of TA-La_1.8Eu_0.2CuO₄−_yF_y (y = 0-0.15) by the fluorination of undoped (Ce-free) TA-La_1.8Eu_0.2CuO₄ using NH₄F. The magnetic susceptibility measurements have revealed that the superconducting transition temperature, T_c, increases with increasing y, exhibits the maximum of 23K at y = 0.025, and decreases. The dome-like dependence of T_c on the doped carrier concentration in the TA-type (La,Eu)-based cuprates is explained in terms of the pairing mediated by spin fluctuations based on the d-p model calculation.

Original language	English
Article number	014701
Journal	journal of the physical society of japan
Volume	89
Issue number	1
DOIs	https://doi.org/10.7566/JPSJ.89.014701
Publication status	Published - 2020

ASJC Scopus subject areas

Physics and Astronomy(all)

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Electron-doping effect on T_c in the undoped (Ce-free) superconductor T¤-La_1.8Eu_0.2CuO₄ studied by the fluorine substitution for oxygen. / Sunohara, Toshiki; Kawamata, Takayuki; Shiosaka, Kota; Takamatsu, Tomohisa; Noji, Takashi; Kato, Masatsune; Koike, Yoji.

In: journal of the physical society of japan, Vol. 89, No. 1, 014701, 2020.

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

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title = "Electron-doping effect on Tc in the undoped (Ce-free) superconductor T¤-La1.8Eu0.2CuO4 studied by the fluorine substitution for oxygen",

abstract = "We have succeeded in synthesizing electron-doped polycrystalline bulk samples of TA-La1.8Eu0.2CuO4−yFy (y = 0-0.15) by the fluorination of undoped (Ce-free) TA-La1.8Eu0.2CuO4 using NH4F. The magnetic susceptibility measurements have revealed that the superconducting transition temperature, Tc, increases with increasing y, exhibits the maximum of 23K at y = 0.025, and decreases. The dome-like dependence of Tc on the doped carrier concentration in the TA-type (La,Eu)-based cuprates is explained in terms of the pairing mediated by spin fluctuations based on the d-p model calculation.",

author = "Toshiki Sunohara and Takayuki Kawamata and Kota Shiosaka and Tomohisa Takamatsu and Takashi Noji and Masatsune Kato and Yoji Koike",

note = "Funding Information: Acknowledgments We are grateful to H. Tsuchiura, K. Yamazaki, M. Ogata, and T. Adachi for the useful discussion. We are indebted to A. Arakawa for her aid in the EPMA measurements. This work was supported by JSPS KAKENHI Grant Number 17H02915. Publisher Copyright: {\textcopyright} 2020 The Physical Society of Japan",

year = "2020",

doi = "10.7566/JPSJ.89.014701",

language = "English",

volume = "89",

journal = "Journal of the Physical Society of Japan",

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T1 - Electron-doping effect on Tc in the undoped (Ce-free) superconductor T¤-La1.8Eu0.2CuO4 studied by the fluorine substitution for oxygen

AU - Sunohara, Toshiki

AU - Kawamata, Takayuki

AU - Shiosaka, Kota

AU - Takamatsu, Tomohisa

AU - Noji, Takashi

AU - Kato, Masatsune

AU - Koike, Yoji

N1 - Funding Information: Acknowledgments We are grateful to H. Tsuchiura, K. Yamazaki, M. Ogata, and T. Adachi for the useful discussion. We are indebted to A. Arakawa for her aid in the EPMA measurements. This work was supported by JSPS KAKENHI Grant Number 17H02915. Publisher Copyright: © 2020 The Physical Society of Japan

PY - 2020

Y1 - 2020

N2 - We have succeeded in synthesizing electron-doped polycrystalline bulk samples of TA-La1.8Eu0.2CuO4−yFy (y = 0-0.15) by the fluorination of undoped (Ce-free) TA-La1.8Eu0.2CuO4 using NH4F. The magnetic susceptibility measurements have revealed that the superconducting transition temperature, Tc, increases with increasing y, exhibits the maximum of 23K at y = 0.025, and decreases. The dome-like dependence of Tc on the doped carrier concentration in the TA-type (La,Eu)-based cuprates is explained in terms of the pairing mediated by spin fluctuations based on the d-p model calculation.

AB - We have succeeded in synthesizing electron-doped polycrystalline bulk samples of TA-La1.8Eu0.2CuO4−yFy (y = 0-0.15) by the fluorination of undoped (Ce-free) TA-La1.8Eu0.2CuO4 using NH4F. The magnetic susceptibility measurements have revealed that the superconducting transition temperature, Tc, increases with increasing y, exhibits the maximum of 23K at y = 0.025, and decreases. The dome-like dependence of Tc on the doped carrier concentration in the TA-type (La,Eu)-based cuprates is explained in terms of the pairing mediated by spin fluctuations based on the d-p model calculation.

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Electron-doping effect on T_c in the undoped (Ce-free) superconductor T¤-La_1.8Eu_0.2CuO₄ studied by the fluorine substitution for oxygen

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