Effects of annealing on the electronic structure of the electron-doped high-Tc superconductor Nd1.85Ce0.15CuO4

被引：2

作者：

Ikeda, M. ^{[1
,2
]}

Yoshida, T. ^{[1
,2
]}

Fujimori, A. ^{[1
,2
]}

Kubota, M. ^{[3
]}

Ono, K. ^{[3
]}

Kaga, Y. ^{[4
]}

Sasagawa, T. ^{[4
,5
]}

Takagi, H. ^{[4
]}

机构：

[1] Univ Tokyo, Dept Complex Sci & Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[2] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[3] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

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

[5] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

INTERNATIONAL SYMPOSIUM ON LATTICE EFFECTS IN CUPRATE HIGH TEMPERATURE SUPERCONDUCTORS (LEHTSC2007) | 2008年 / 108卷

关键词：

D O I：

10.1088/1742-6596/108/1/012016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have performed an angle-resolved photoemission spectroscopy (ARPES) study of as-grown Nd1.85Ce0.15CuO4 (ag-NCCO) and annealed Nd1.85Ce0.15CuO4 (an-NCCO) samples in order to elucidate how the superconductivity is induced by the annealing process in Nd2-xCexCuO4. In the ARPES spectra of ag-NCCO, a gap opens in the nodal region due to the effects of antiferromagnetism. This nodal gap is closed in an-NCCO, indicating that the effects of antiferromagnetism become weaker by annealing, similar to the previous ARPES results on Pr1.85Ce0.15CuO4. However, while in as-grown Pr1.85Ce0.15CuO4 the gap opens on the entire Fermi surface, in ag-NCCO the gap does not open around (pi, 0).

引用

页数：6

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