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

Research output: Contribution to journal › Article

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 Jan 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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Sunohara, T., Kawamata, T., Shiosaka, K., Takamatsu, T., Noji, T., Kato, M., & Koike, Y. (2020). 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. journal of the physical society of japan, 89(1), [014701]. https://doi.org/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. / 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, 01.01.2020.

Research output: Contribution to journal › Article

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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.",

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AU - Sunohara, Toshiki

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AU - Shiosaka, Kota

AU - Takamatsu, Tomohisa

AU - Noji, Takashi

AU - Kato, Masatsune

AU - Koike, Yoji

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