Photoemission study of Pb on Ge(111)
- Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801 (United States) Materials Research Laboratory, University of Illinois at Urbana-Champaign, 104 South Goodwin Avenue, Urbana, Illinois 61801 (United States)
Photoemission spectroscopy with synchrotron radiation, Auger electron spectroscopy, and high-energy electron diffraction have been used to study the Pb-induced reconstructions of the Pb/Ge(111) system. The Ge 3[ital d] and Pb 5[ital d] core levels and valence bands are analyzed as a function of Pb coverage and annealing temperature. We have observed three ([radical]3 [times] [radical]3 )[ital R]30[degree] reconstructions with ideal Pb coverages of 1/6, 1/3, and 4/3 monolayer (in substrate units), the latter being the completion coverage for the first two-dimensional adlayer following the Stranski-Krastanov growth mode. The band bending for this system will be discussed in the monolayer regime. Surface core levels and surface states were observed which suggest a simple [ital T][sub 4] adatom geometry for the lower coverage ([radical]3 [times] [radical]3 )[ital R]30[degree] reconstructions.
- DOE Contract Number:
- FG02-91ER45439
- OSTI ID:
- 7002005
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:7; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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