Physics
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jap....70.3115r&link_type=abstract
Journal of Applied Physics (ISSN 0021-8979), vol. 70, Sept. 15, 1991, p. 3115-3126. Research supported by University of Minnesot
Physics
4
Crystal Growth, Mercury Cadmium Tellurides, Semiconductor Junctions, Solid-Solid Interfaces, Synchrotron Radiation, Ytterbium Compounds, Interlayers, Mercury Alloys, Photoelectric Emission, Xenon
Scientific paper
Detailed synchrotron radiation photoemission studies of Yb/Hg(1-x)Cd(x)Te junctions as a function of Yb coverage were performed at room temperature. Photoemission from physisorbed xenon after cooling the sample to 35 K was also used to examine the local overlayer work function and the development of interface morphology. For Yb coverages less than 6 A, the data provide evidence for the lateral growth of islands consisting of Yb-Te reaction products involving divalent Yb, and an associated Hg depletion within an 18-A-thick near-surface layer. Upon island coalescence at an Yb coverage of 6 A, the formation of a metallic Yb-rich layer at the surface is observed. This layer traps Hg atoms diffusing across the interface through the formation of an Yb-Hg alloy, and is responsible for the nonmonotonic behavior of the Hg interface concentration as a function of Yb coverage.
Franciosi Alfonso
Haugstad G.
Raisanen Antti
Yu Xiaotong
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