TY - JOUR
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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U2 - 10.7566/JPSJ.89.014701
DO - 10.7566/JPSJ.89.014701
M3 - Article
AN - SCOPUS:85078142319
VL - 89
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 1
M1 - 014701
ER -