Soft incommensurate reconstruction on Pb/Si(111): Structure, stress modulation, and phase transition
- 15 April 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 51 (15) , 10193-10196
- https://doi.org/10.1103/physrevb.51.10193
Abstract
We resolve the atomic structure of the one-monolayer incommensurate (IC) reconstruction of Pb on Si(111) using a tunneling microscope. The local structure of this surface consists of two types of Pb trimers and a quasi-1×1 region, while on larger (>10 Å) scales the trimers are assembled into alternating domains discommensurate with the substrate. One feature of this surface is the sensitivity of the domain morphology to surface-stress inhomogeneities. This sensitivity dramatically alters the temperature at which the IC phase transforms locally to a 1×1 phase.Keywords
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