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
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.
引用
收藏
页码:349 / 354
页数:6
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