SYSTEMATIC TRENDS IN THE NORMAL ENHANCEMENT OF THE PHONON ANHARMONICITY AT THE SURFACE OF METALS

被引：40

作者：

BENEDEK, G

TOENNIES, JP

机构：

[1] Max-Planck-Institut für Strömungsforschung, D 3400 Göttingen

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.46.13643

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The temperature dependence of the Rayleigh wave frequency measured by He atom scattering for the surfaces Al(001), Al(111), and Cu(001) is compared with bulk data in order to establish the surface enhancement of phonon anharmonicity. A comparison is made also with recent HREELS data for the Cu(110) surface. In all cases the surface anharmonicity is found to be less than or at most of the order of twice the bulk anharmonicity, in agreement with recent calculations of the enhancement of the zero-point mean-square displacements.

引用

页码：13643 / 13646

页数：4

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