Electron-Doping Effect on Tc in the Undoped (Ce-Free) Superconductor T'-La1.8Eu0.2CuO4 Studied by the Fluorine Substitution for Oxygen
| Autor: | Masatsune Kato, Takayuki Kawamata, Yoji Koike, Takashi Noji, Tomohisa Takamatsu, Toshiki Sunohara, Kota Shiosaka |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Condensed Matter - Superconductivity Doping Analytical chemistry FOS: Physical sciences General Physics and Astronomy chemistry.chemical_element Magnetic susceptibility Superconductivity (cond-mat.supr-con) chemistry Pairing Fluorine Cuprate Crystallite Spin (physics) |
| Popis: | We have succeeded in synthesizing electron-doped polycrystalline bulk samples of T'-La1.8Eu0.2CuO4-yFy (y = 0 - 0.15) by the fluorination of undoped (Ce-free) T'-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 23 K at y = 0.025, and decreases. The dome-like dependence of Tc on the doped carrier concentration in the T'-type (La,Eu)-based cuprates is explained in terms of the pairing mediated by spin fluctuations based on the d-p model calculation [K. Yamazaki et al., J. Phys.: Conf. Ser. 871, 012009 (2017)]. 14 pages, 5 figures |
| Databáze: | OpenAIRE |
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