Chemical potential shift in Nd2-xCexCuO4:: Contrasting behavior between the electron- and hole-doped cuprates -: art. no. 220507

被引：83

作者：

Harima, N ^{[1
]}

Matsuno, J

Fujimori, A

Onose, Y

Taguchi, Y

Tokura, Y

机构：

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

[2] Univ Tokyo, Dept Complex Sci & Engn, Bunkyo Ku, Tokyo 1130033, Japan

[3] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.64.220507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the chemical potential shift in the electron-doped superconductor Nd2-xCexCuO4 by precise measurements of core-level photoemission spectra. The result shows that the chemical potential monotonously increases with electron doping, quite differently from La2-xSrxCuO4, where the shift is suppressed in the underdoped region. If the suppression of the shift in La2-xSrxCuO4 is attributed to strong stripe fluctuations, the monotonous increase of the chemical potential is consistent with the absence of stripe fluctuations in Nd2-xCexCuO4. The chemical potential jump between Nd2CuO4 and La2CuO4 is suggested to be much smaller than the optical band gaps.

引用

页数：4

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