Evidence for trimer reconstruction of Si(111) √3 × √3 -Sb: Scanning tunneling microscopy and first-principles theory
- 15 October 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 42 (11) , 7230-7233
- https://doi.org/10.1103/physrevb.42.7230
Abstract
Scanning-tunneling-microscopy images of the Si(111) √3 × √3 -Sb surface show a trigonal lattice of protrusions, with a characteristic dependence on bias voltage. When probing filled surface states, the protrusions consist of three topographic maxima, while probing empty surface states gives a single maximum. These observations are interpreted in terms of an Sb-trimer model, the structure of which is obtained through first-principles calculations. Charge-density contours show that the three maxima seen when probing filled states can be directly related to the positions of the Sb-trimer atoms.Keywords
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