Journal
PHYSICAL REVIEW B
Volume 78, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.245407
Keywords
effective mass; elemental semiconductors; germanium; interface states; metallic thin films; photoelectron spectra; semiconductor quantum wells; semiconductor-metal boundaries; silver
Funding
- National Science Council of Taiwan [NSC 95-2120-M-007061, NSC 95-2112-M-007-062-MY3]
- National Synchrotron Radiation Research Center
- U.S. Department of Energy [DE-FG02-07ER46383]
- Petroleum Research Fund
- American Chemical Society
- U.S. National Science Foundation [DMR-05-03323, DMR-00-84402]
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Subband dispersions of quantum-well states in Ag films on Ge(111) have been determined by angle-resolved photoemission. The effective masses of the subbands at the zone center increase substantially for decreasing film thicknesses. This peculiar behavior is attributed to a kinetic constraint for standing-wave formation governed by a momentum-dependent phase-shift function. No evidence is found for in-plane electron localization within the confined geometry.
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