ORGAN-PIPE MODES OF SODIUM EPITAXIAL MULTILAYERS ON CU(001) OBSERVED BY INELASTIC HELIUM-ATOM SCATTERING

被引：79

作者：

BENEDEK, G ^{[1
]}

ELLIS, J ^{[1
]}

REICHMUTH, A ^{[1
]}

RUGGERONE, P ^{[1
]}

SCHIEF, H ^{[1
]}

TOENNIES, JP ^{[1
]}

机构：

[1] MAX PLANCK INST STROMUNGSFORSCH,W-3400 GOTTINGEN,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.69.2951

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Inelastic helium-atom scattering from epitaxial films (2-20 monolayers) of sodium on Cu(001) reveals a large number of nearly dispersionless phonon modes whose frequencies depend on the thickness and scale as the lower harmonics of an open-ended organ pipe. These data provide evidence for confined acoustic resonances, corresponding to longitudinal standing waves normal to the surface with frequencies about 20% larger than in the bulk.

引用

页码：2951 / 2954

页数：4

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