Lanthanide substitution effects in electron-doped High-Tc superconductors studied by angle-resolved photoemission spectroscopy

被引：6

作者：

Ikeda, M.

Yoshida, T.

Fujimori, A.

Kubota, M.

Ono, K.

Unozawa, K.

Sasagawa, T.

Takagi, H.

机构：

[1] Univ Tokyo, Dept Complex Sci & Engn, Chiba 2778561, Japan

[2] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[3] Univ Tokyo, Dept Adv Mat Sci, Chiba 2778561, Japan

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2007年 / 20卷 / 7-8期

关键词：

electron-doped high-T-c superconductor; antiferromagnetism; photoemission;

D O I：

10.1007/s10948-007-0268-x

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have performed an angle-resolved photoemission study of the electron-doped high-T (c) superconductors (HTSCs) Sm1.85Ce0.15CuO4 (SCCO) and Eu1.85Ce0.15CuO4 (ECCO). Around the nodal point (k) over right arrow similar to(pi/2,pi/2), we observed an energy gap at the Fermi level (E-F) for both samples, resulting from the strong effects of antiferromagnetism. The magnitude of this gap in ECCO is larger than that in SCCO, implying that the effects of antiferromagnetism in ECCO are stronger than that in SCCO. Also, we quantitatively confirmed the effects of antiferromagnetism by the band dispersions to tight-binding calculation.

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页码：563 / 565

页数：3

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