SELF-LOCALIZED SURFACE-MODES ON ANHARMONIC CRYSTALS

被引：11
|
作者：
RABELO, JNT
MARADUDIN, AA
机构：
[1] UNIV CALIF IRVINE,INST SURFACE & INTERFACE SCI,IRVINE,CA 92717
[2] UNIV FED GOIAS,IMF,DEPT FIS,BR-74001970 GOIANIA,BRAZIL
来源：
PHYSICS LETTERS A | 1995年 / 205卷 / 04期
关键词：
D O I：
10.1016/0375-9601(95)00594-S
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An approach based on the lattice Green function method for a semi-infinite crystal, and the use of the rotating wave approximation, is developed to investigate the existence of high frequency self-localized anharmonic surface vibrations. Solutions are found for such simple models as a semi-infinite linear chain and a scalar model of a simple cubic crystal with a (001) free surface. The frequencies of the modes and the amplitudes of the atomic displacements are calculated. The stability of the modes is also investigated.
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页码：349 / 354
页数：6
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