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Browsing by Author "Miller, T."

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    Enhancement of subband effective mass in Ag/Ge(111) thin film quantum wells
    (2008-12-01)
    Tang, S. -J.
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    Chang, Wen-Kai
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    Chiu, Yu-Mei
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    Chen, Hsin-Yi
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    Cheng, Cheng-Maw
    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.