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Electronic structure of the gold/Bi2Sr2CaCu2O8and gold/EuBa2Cu3O7−&dgr;interfaces as studied by photoemission spectroscopy

 

作者: D. S. Dessau,   Z.‐X. Shen,   B. O. Wells,   W. E. Spicer,   R. S. List,   A. J. Arko,   R. J. Bartlett,   Z. Fisk,   S‐W. Cheong,   D. B. Mitzi,   A. Kapitulnik,   J. E. Schirber,  

 

期刊: Applied Physics Letters  （AIP Available online 1990）
卷期: Volume 57, issue 3  

页码: 307-309

 

ISSN:0003-6951

 

年代: 1990

 

DOI:10.1063/1.104219

 

出版商: AIP

 

数据来源: AIP

 

摘要:

High‐resolution photoemission has been used to probe the electronic structure of the gold/Bi2Sr2CaCu2O8and gold/EuBa2Cu3O7−&dgr;interface formed by a low‐temperature (20 K) gold evaporation on cleaved high quality single crystals. We find that the metallicity of the EuBa2Cu3O7−&dgr;substrate in the near surface region (∼5 A˚) is essentially destroyed by the gold deposition, while the near surface region of Bi2Sr2CaCu2O8remains metallic. This has potentially wide ranging consequences for the applicability of the different types of superconductors in real devices.

 

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