SYNCHROTRON-RADIATION SOFT-X-RAY PHOTOEMISSION-STUDY OF LEAD ON BI2CASR2CU2O8

Nyholm, R.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 (författare)

NR 20140805
In this paper we present a study of the interaction of Pb with a clean single-crystal Bi2CaSr2Cu2O8 superconductor surface based on photoemission and low-energy electron diffraction (LEED). Deposition of Pb on a Bi2CaSr2Cu2O8 Crystal kept at room temperature gives rise to the formation of metallic Bi and oxidized Pb at the interface. This behavior could not be observed when the crystal was kept at 100 K during Pb deposition. For all investigated Pb overlayers on a cold crystal (100 K), surface-sensitive photoelectron spectroscopy revealed the growth of a covering metallic Pb overlayer film. The growth at 100 K, contrary to the growth at room temperature, preserved the original LEED 5 X 1 pattern even for Pb depositions corresponding to a 24-angstrom thick overlayer indicating epitaxial growth. Furthermore, a rigid 0.4-eV shift of the valence band and the Bi 5d core levels is observed upon initial Pb deposition and is tentatively attributed to electron doping.

SODERHOLM, SKTH Royal Institute of Technology (författare)
Karlsson, U. O.KTH Royal Institute of Technology,KTH,Skolan för informations- och kommunikationsteknik (ICT),Materialfysik(Swepub:lu)mphy-uka (författare)
FLODSTROM, SAKTH Royal Institute of Technology (författare)
QVARFORD, MLund University (författare)
Andersen, J. N.Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)slju-jan (författare)
NYHOLM, R (författare)
Lindau, I.Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)slju-ili (författare)
KTH Royal Institute of TechnologySynkrotronljusfysik (creator_code:org_t)

Av författaren/redakt...: Nyholm, R.; SODERHOLM, S; Karlsson, U. O.; FLODSTROM, SA; QVARFORD, M; Andersen, J. N.; visa fler...; NYHOLM, R; Lindau, I.; visa färre...

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