ELECTRONIC-STRUCTURE OF LA2-XSRXCUO4 STUDIED BY SOFT-X-RAY-FLUORESCENCE SPECTROSCOPY WITH TUNABLE EXCITATION

被引：45

作者：

GUO, JH ^{[1
]}

BUTORIN, SM ^{[1
]}

WASSDAHL, N ^{[1
]}

SKYTT, P ^{[1
]}

NORDGREN, J ^{[1
]}

MA, Y ^{[1
]}

机构：

[1] PACIFIC NW LAB, MARINE SCI RES INST, RICHLAND, WA 99352 USA

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.49.1376

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The O K alpha x-ray fluorescence of La2-xSrxCuO4 (x = 0.02, 0.04, 0.07, 0.1, 0.15) has been recorded using tunable and high-resolution monochromatized synchrotron-radiation excitation. A strong variation in the shape of the O K alpha emission spectra depending on incidence photon energy is observed. This variation results from different in-plane and apical oxygen contributions to the emission line. The x-ray emission bands which reflect the partial density of 2p states pertaining to the two inequivalent oxygen sites are distinguished. The experimental results show that holes induced by the Sr doping are mainly located on in-plane oxygen atoms and suggest the existence, at least at x greater than or equal to 0.07, of doped holes which have Cu3d(xz,yz)-O 2p(z) pi character.

引用

页码：1376 / 1380

页数：5

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