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).
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页数：6
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