Corrugating and anticorrugating static interactions in helium-atom scattering from metal surfaces

被引：33

作者：

Jean, N

Trioni, MI

Brivio, GP

Bortolani, V

机构：

[1] UdR Milano Bicocca, Ist Nazl Fis Mat, I-20125 Milan, Italy

[2] Univ Milano Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy

[3] Univ Modena & Reggio Emilia, INFM S3, I-41100 Modena, Italy

[4] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.92.013201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform a density-functional-theory calculation of the static repulsive potential of He scattering off a noble and a simple metal surface. The classical turning point of He on Cu(111) is found to be closer to the metal when the adatom is at top than at bridge site (anticorrugating effect). The potential of He on Al(111) is instead corrugated. By comparing the results of the two systems, we conclude that the He-metal anticorrugating effect occurs when the kinetic energy difference for He at top and bridge sites is larger than the electrostatic one, and an induced localized dipole on He is formed.

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页数：4

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