Nature of the valence band states in Bi2(Ca, Sr, La)3Cu2O8
作者:
B. O. Wells,
P. A. P. Lindberg,
Z.‐X. Shen,
D. S. Dessau,
W. E. Spicer,
I. Lindau,
D. B. Mitzi,
A. Kapitulnik,
期刊:
AIP Conference Proceedings
(AIP Available online 1990)
卷期:
Volume 200,
issue 1
页码: 36-41
ISSN:0094-243X
年代: 1990
DOI:10.1063/1.39050
出版商: AIP
数据来源: AIP
摘要:
We have used photoemission spectroscopy to examine the symmetry of the occupied states of the valence band for the La doped superconductor Bi2(Ca, Sr, La)3Cu2O8. While the oxygen states near the bottom of the 7 eV wide valence band exhibit predominantly O 2pzsymmetry, the states at the top of the valence band extending to the Fermi level are found to have primarily O 2pxand O 2pycharacter. We have also examined anomalous intensity enhancements in the valence band feature for photon energies near 18 eV. These enhancements, which occur at photon energies ranging from 15.8 to 18.0 eV for the different valence band features, are not consistent with either simple final state effects or direct O2s transitions to unoccupied O2p states.
点击下载:
PDF
(368KB)
返 回