EMPTY O2P(PI), STATES OF PRBA2CU3O7-DELTA

被引：9

作者：

HARTMANN, A

RUSSELL, GJ

机构：

[1] School of Physics, The University of New South Wales, Sydney

来源：

SOLID STATE COMMUNICATIONS | 1995年 / 95卷 / 11期

关键词：

HIGH-T-C; SUPERCONDUCTORS; NEXAFS; ELECTRONIC STATES (LOCALIZED); SYNCHROTRON RADIATION;

D O I：

10.1016/0038-1098(95)00293-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A systematic study of O1s-NEXAFS spectra from high oxygen content PTBa2CU3O6.9+/-0.1 and NdBa2CU3O6.9+/-0.1 Single crystals is presented and provides further information concerning our understanding of the suppression of (super)conductivity in PrBa2Cu3O7-delta In addition, O1s-NEXAFS spectra from Pr6O11 and Pr2O3 pressed powders indicate differences associated with the different Pr valence values. Both symmetry and density of empty O2p-hole states just above the Fermi level of PrBa2CU3O6.9+/-0.1 and NdBa2CU3O6.9+/-0.1 appear to be identical. Interpretation of the data does not indicate that the Pr valence value for PrBa2Cu3 O-6.9+/-0.1 is above 3+ or trapping of O2p-hole states occurs in O2p pi orbits which point towards the rare earth sites.

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收藏

页码：791 / 795

页数：5

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