THE ORIGIN OF FORCE-CONSTANT SOFTENING ON THE CLOSE-PACKED NOBLE-METAL SURFACES

被引：12

作者：

BORTOLANI, V ^{[1
]}

ERCOLESSI, F ^{[1
]}

TOSATTI, E ^{[1
]}

FRANCHINI, A ^{[1
]}

SANTORO, G ^{[1
]}

机构：

[1] SCUOLA INT SUPER STUDI AVANZATI,I-34014 TRIESTE,ITALY

来源：

EUROPHYSICS LETTERS | 1990年 / 12卷 / 02期

关键词：

D O I：

10.1209/0295-5075/12/2/010

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A qualitatively new mechanism is proposed for the well-known in-plane force softening found on many noble-metal surfaces. The mechanism is discussed in terms of one of the recently developed many-body force schemes and is shown to amount to an effective decrease of the lateral atomic.sizes of the surface atom. Its strong sensitivity to the strength of the many body force terms, as well as to surface relaxation and reconstruction, is emphasized. As a nontrivial illustration, we calculate the phonons of Au(lll), and show that the exceedingly large softening leading to the recently observed anomalous longitudinal resonance is directly related to our proposed mechanism. © 1990 IOP Publishing Ltd.

引用

页码：149 / 154

页数：6

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