Angle resolved photoemission from Nd1.85Ce0.15CuO4 using high energy photons:: A Fermi surface investigation -: art. no. 136402

被引:38
作者
Claesson, T
Månsson, M
Dallera, C
Venturini, F
Nadaï, CD
Brookes, NB
Tjernberg, O
机构
[1] Royal Inst Technol, Lab Mat & Semiconductor Phys, S-16440 Kista, Sweden
[2] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy
[3] European Synchrotron Radiat Facil, ESRF, F-38043 Grenoble, France
关键词
D O I
10.1103/PhysRevLett.93.136402
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have performed an angle resolved photoemission study on a single crystal of the optimally electron doped (n-type) cuprate superconductor Nd2-xCexCuO4 (x=0.15) at a photon energy of 400 eV. The Fermi surface is mapped out and is, in agreement with earlier measurements, of hole-type with the expected Luttinger volume. However, comparing with previous low energy measurements, we observe a different Fermi surface shape and a different distribution of spectral intensity around the Fermi surface contour. The observed Fermi surface shape indicates a stronger electron correlation in the bulk as compared to the surface.
引用
收藏
页码:136402 / 1
页数:4
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