HOLE STATES IN CUO2 PLANES AND CU-O CHAINS OF YBA2CU3O7 AND YBA2CU4O8 PROBED BY SOFT-X-RAY ABSORPTION-SPECTROSCOPY

被引:59
作者
KROL, A
MING, ZH
KAO, YH
NUCKER, N
ROTH, G
FINK, J
SMITH, GC
PARK, KT
YU, JJ
FREEMAN, AJ
ERBAND, A
MULLERVOGT, G
KARPINSKI, J
KALDIS, E
SCHONMANN, K
机构
[1] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST NUKL FESTKORPERPHYS,W-7500 KARLSRUHE 1,GERMANY
[2] BROOKHAVEN NATL LAB,UPTON,NY 11973
[3] NORTHWESTERN UNIV,DEPT PHYS,EVANSTON,IL 60208
[4] UNIV KARLSRUHE,INST KRISTALLCHEM,W-7500 KARLSRUHE,GERMANY
[5] SWISS FED INST TECHNOL,FESTKORPERPHYS LAB,CH-8093 ZURICH,SWITZERLAND
[6] WALTER MEISSNER INST,W-8046 GARCHING,GERMANY
来源
PHYSICAL REVIEW B | 1992年 / 45卷 / 05期
关键词
D O I
10.1103/PhysRevB.45.2581
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The symmetry and density of unoccupied states of twin-free YBa2Cu3O7 and YBa2Cu4O8 single crystals have been investigated by orientation-dependent x-ray absorption spectroscopy at the O 1s edge, using a bulk-sensitive fluorescence-yield-detection method. In conjunction with earlier results obtained by electron-energy-loss spectroscopy, the relative density of unoccupied states for different oxygen sites has been derived. Comparison with local-density energy-band-structure calculations shows reasonable agreement with the experimental results.
引用
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页码:2581 / 2584
页数:4
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