RESONANT-PHOTOEMISSION STUDY OF ND2-XCEXCUO4

被引：69

作者：

NAMATAME, H

FUJIMORI, A

TOKURA, Y

NAKAMURA, M

YAMAGUCHI, K

MISU, A

MATSUBARA, H

SUGA, S

EISAKI, H

ITO, T

TAKAGI, H

UCHIDA, S

机构：

[1] SCI UNIV TOKYO, DEPT PHYS, SHINJUKU KU, TOKYO 162, JAPAN

[2] UNIV TOKYO, INST SOLID STATE PHYS, SYNCHROTRON RADIAT LAB, TANASHI, TOKYO 188, JAPAN

[3] UNIV TOKYO, ENGN RES INST, TOKYO 113, JAPAN

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.41.7205

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the photoemission spectra of Nd2-xCexCuO4 (0.05x0.2) using synchrotron radiation in the Cu 3p3d, Nd 4d4f, and Ce 4d4f core absorption regions. The valence-band satellite corresponding to Cu2+ shows a resonance behavior. The Nd 4f derived photoemission spectrum shows a double-peak structure, which is characteristic of the localized 4f3 ground state and strong 4fO 2p hybridization. The Ce 4f derived photoemission is distributed predominantly near the top of the O 2p band. Comparing the results with those of La2-xSrxCuO4, we find that the Fermi level is located only 0.7 eV above the top of the valence band in spite of the large (1.5eV) band gap of Nd2CuO4, indicating that the Fermi level of Nd2-xCexCuO4 lies within the band gap of Nd2CuO4. © 1990 The American Physical Society.

引用

页码：7205 / 7208

页数：4

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