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Subpicosecond interconversion of buckled and symmetric dimers on Si(100)

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
232
Issue
3
Identifiers
DOI: 10.1016/0039-6028(90)90112-l

Abstract

Abstract Finite temperature molecular dynamics simulations provide the first theoretical evidence for subpicosecond dynamical behavior on a defect-free Si(100) surface; the instantaneous distribution of buckled and symmetric dimers is found to be ∼ 2: 3; buckled dimers rapidly interconvert with symmetric dimers, with the buckling direction alternating along a row; only symmetric dimers are observed on a time average; and we find that collective motion of ⩾ 5 Si layers is involved in the reconstruction. Thus, the observed surface structure should depend on experimental time scales.

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