Devyatov, V. G. ; Koshcheev, S. V. ; Cherkashin, A. E. ; Gluskin, E. S. ; Dudnikov, A. V. ; Dudnikov, V. G. ; Sood, A. K. ; Sahnie, V. S. ; Ventkataraman, G. (1989) Resonant photoemission from the surface of a high-temperature Y---Ba---Cu---O superconductor Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 282 (2-3). pp. 688-691. ISSN 0168-9002
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0168-9002(89)90082-X
Abstract
Photoemission measurements using synchrotron radiation are reported on YBa2Cu3O7-x having a superconducting transition temperature of 90 K. The experiments were performed over a photon energy range of 40-161 eV as well as using Mg X-rays. An unusual enhancement of photoemission intensity associated with Ba(5p) and Ba(5s) levels was observed for a photon energy of ~104 eV. Our results suggest a different chemical composition of the surface and volume, two types of oxygen sites in the material, and a predominantly monovalent state of copper after Ar+ etching.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 50190 |
| Deposited On: | 22 Jul 2011 13:42 |
| Last Modified: | 22 Jul 2011 13:42 |
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