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

doi:10.7566/JPSJ.85.093703

Pairing symmetry studied from impurity effects in the undoped superconductor T′-La_1.8Eu_0.2CuO₄

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

ENG - Applied Physics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We have investigated the effects of magnetic Ni and nonmagnetic Zn impurities on the superconductivity in undoped T′-La_1.8Eu_0.2CuO₄ (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 T_c 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-La_2-xSr_xCuO₄ 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 language	English
Article number	093703
Journal	journal of the physical society of japan
Volume	85
Issue number	9
DOIs	https://doi.org/10.7566/JPSJ.85.093703
Publication status	Published - 2016 Sept 15

ASJC Scopus subject areas

Physics and Astronomy(all)

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

abstract = "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.",

author = "Koki Ohashi and Takayuki Kawamata and Tomohisa Takamatsu and Tadashi Adachi and Masatsune Kato and Yoji Koike",

note = "Funding Information: This work was supported by MEXT KAKENHI Grant Number 23108004. Publisher Copyright: {\textcopyright}2016 The Physical Society of Japan.",

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AU - Ohashi, Koki

AU - Kawamata, Takayuki

AU - Takamatsu, Tomohisa

AU - Adachi, Tadashi

AU - Kato, Masatsune

AU - Koike, Yoji

PY - 2016/9/15

Y1 - 2016/9/15

N2 - 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.

AB - 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.

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Pairing symmetry studied from impurity effects in the undoped superconductor T′-La_1.8Eu_0.2CuO₄

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