Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
60 (1992), S. 2631-2633
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Using angle resolved laser photoemission spectroscopy we have measured the transient narrowing of the surface state band gap on the cleaved Ge(111) 2×1 surface. The reconstruction of this surface results in the formation of one-dimensional π bonded chains of atoms which give rise to bonding and antibonding bands whose energy/wave vector dispersions are one-dimensional as well. Photoexcitation of this surface produces a transient π* population which, in turn, leads to an observed narrowing of the surface band gap. We have investigated this renormalization as a function of surface carrier density and laser excitation fluence.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.106903
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