Role of the Metal/Semiconductor Interface in Quantum Size Effects: PbSi(111)
- 11 December 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 85 (24), 5158-5161
- https://doi.org/10.1103/physrevlett.85.5158
Abstract
Self-organized islands of uniform heights can form at low temperatures on metal/semiconductor systems as a result of quantum size effects, i.e., the occupation of discrete electron energy levels in the film. We compare the growth mode on two different substrates [Si(111)- vs Si(111)- ] with spot profile analysis low-energy electron diffraction. For the same growth conditions (of coverage and temperature) 7-step islands are the most stable islands on the phase, while 5-step (but larger islands) are the most stable islands on the . A theoretical calculation suggests that the height selection on the two interfaces can be attributed to the amount of charge transfer at the interface.
Keywords
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