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

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We have succeeded in synthesizing electron-doped polycrystalline bulk samples of TA-La1.8Eu0.2CuO4yFy (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.

Original languageEnglish
Article number014701
Journaljournal of the physical society of japan
Issue number1
Publication statusPublished - 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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