Effective kondo model for a trimer on a metallic surface

被引：22

作者：

Aligia, AA ^{[1
]}

机构：

[1] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.96.096804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

I consider a Hubbard-Anderson model which describes localized orbitals in three different atoms hybridized both among themselves and with a continuum of extended states. Using a generalized Schrieffer-Wolf transformation, I derive an effective Kondo model for the interaction between the doublet ground state of the isolated trimer and the extended states. For an isoceles trimer with distances a, l, l between the atoms, the Kondo temperature is very small for l < a and has a maximum for finite l > a when a is small. The results agree with experiments for a Cr trimer on Au(111).

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页数：4

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