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A straight domain boundary of single-atom width on a Si(111)-(7 × 7) surface

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
296
Issue
1
Identifiers
DOI: 10.1016/0039-6028(93)90134-6

Abstract

Abstract Using scanning tunneling microscopy (STM), we have observed an antiphase domain boundary of single-atom width on a Si(111)-(7 × 7) surface. The extra row of adatoms forming the boundary lies on the unfaulted half of the 7 × 7 unit cell, in agreement with total energy calculations using the first-principles self-consistent pseudofunction method. The filled-state STM image shows a missing interior adatom on the unfaulted half, in agreement with calculations of the partial density of states of an adatom surrounded by three rest-atoms.

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