Electronic Homogeneity in the Overdoped Regime of the Electron-Doped High-Tc Superconductors

27th International Conference on Low Temperature Physics

Baqiya, M.A.^1 ; Adachi, T.^2 ; Takahashi, A.^1 ; Prombood, T.^1 ; Watanabe, M.^1 ; Fukumoto, K.^1 ; Tanabe, Y.^1 ; Koike, Y.^1

Department of Applied Physics, Tohoku University, Sendai

980-8579, Japan^1

Department of Engineering and Applied Sciences, Sophia University, Tokyo

102- 8554, Japan^2

关键词: Electron doped cuprates;    High Tc superconductors;    High-Tc cuprates;    Magnetization curves;    Overdoped regime;    Second magnetization peaks;    Sommerfeld constant;    Superconducting state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/2/022002/pdf
DOI  :  10.1088/1742-6596/568/2/022002

来源: IOP

【 摘 要 】

In order to investigate The electronic homogeneity in electron-doped high-Tccuprates, magnetization and specific heat measurements have been performed for Pr1-xLaCexCuO4single crystals with x 0.13-0.17. It has been found from The magnetization curve that The hysteresis is relatively small and that The so-called second magnetization peak is absent for every x. Moreover, The Sommerfeld constant in The ground state has shown HlnH dependence on magnetic field H for every x, suggesting that The superconductivity is not pure but dirty. These results are in contrast to those observed in The overdoped regime of hole-doped La2-xSrxCuO4where an inhomogeneous superconducting state is formed in spite of The superconductivity being pure. Therefore, it has been concluded that a rather homogeneous electronic state is realized in The electron-doped cuprates, suggesting different electronic states between hole- and electron-doped cuprates.