Pairing symmetry studied from impurity effects in the undoped superconductor T′-La1.8Eu0.2CuO4

Koki Ohashi, Takayuki Kawamata, Tomohisa Takamatsu, Tadashi Adachi, Masatsune Kato, Yoji Koike

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7 Citations (Scopus)


We have investigated the effects of magnetic Ni and nonmagnetic Zn impurities on the superconductivity in undoped T′-La1.8Eu0.2CuO4 (T′-LECO) with the Nd2CuO4-type structure, using polycrystalline bulk samples, to clarify the pairing symmetry. It has been found that the suppression rates of the superconducting transition temperature Tc by both Ni and Zn impurities are nearly the same and are very similar to those in the optimally doped and overdoped regimes of hole-doped T-La2-xSrxCuO4 with the K2NiF4-type structure. These results strongly suggest that the superconductivity in undoped T′-LECO has d-wave symmetry and is mediated by the spin fluctuation.

Original languageEnglish
Article number093703
Journaljournal of the physical society of japan
Issue number9
Publication statusPublished - 2016 Sept 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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