CONTINUUM APPROXIMATIONS TO DOMAIN-WALLS IN UNIAXIALLY INCOMMENSURATE MONOLAYER SOLIDS

被引：6

作者：

BRUCH, LW

机构：

[1] Department of Physics, University of Wisconsin-Madison, Madison

来源：

SURFACE SCIENCE | 1991年 / 250卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0039-6028(91)90730-G

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Uniaxially incommensurate monolayer solids are modelled using elastic constants for the adatom-adatom energy and amplitudes for the spatially periodic terms of the adatom-substrate potential energy. Rectangular adlayers on bcc(110) substrates and uniaxially incommensurate adlayers derived from triangular commensurate adlayers on triangular substrates are treated. The energy of an isolated domain wall is derived, with a variational approximation, for three structures: a superheavy wall with one-component displacement vector, a heavy wall with two-component displacement vector, and a modified heavy wall which includes both sets of threefold sites or an fcc(111) substrate. The relative stability of the structures as a function of the elastic constants is discussed.

引用

页码：267 / 278

页数：12

共 21 条

[1] COMPUTATIONAL STATISTICAL-MECHANICS METHODOLOGY, APPLICATIONS AND SUPERCOMPUTING [J].