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PHOTOEMISSION-STUDY OF THE BI2CASR2CU2O8 SUPERCONDUCTOR WITH CU, AG AND AU OVERLAYERS
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- Nyholm, R. (author)
- Lund University,Lunds universitet,KTH Royal Institute of Technology,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- QVARFORD, M (author)
- Lund University
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- SODERHOLM, S (author)
- KTH Royal Institute of Technology
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- NYHOLM, R (author)
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- (creator_code:org_t)
- 1993
- 1993
- English.
- In: Physica. C, Superconductivity. - 0921-4534 .- 1873-2143. ; 218:1-2, s. 103-108
- Journal article (peer-reviewed)
Abstract
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- In this paper, we present a photoemission study of the interaction of Cu, Ag and Au with clean single-crystal Bi2CaSr2Cu2O8 superconductor surfaces. Both the valence-band and the Bi 5d, O 1 s and Sr 3d core levels were monitored for all overlayers. Cu, Ag and Au were deposited as consecutively thicker layers starting with a third of a monolayer and progressing in steps up to a deposition in the range of eight monolayers. Comparing the results for the different overlayers reveals the Ag overlayer to be less reactive than Au which causes the formation of metallic Bi on cleaved Bi2CaSr2Cu2O8 surface. Cu is shown to be the most reactive of the three metals. The Au and Ag overlayers display an island-growth mode, while Cu grows in a layer-by-layer fashion.
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- Nyholm, R.
- QVARFORD, M
- SODERHOLM, S
- NYHOLM, R
- KARLSSON, Ulf O
- Lindau, I.
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- FLODSTROM, AS
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