Density of states in quasicrystals and approximants: Tunneling experiment on bare and oxidized surfaces

被引：83

作者：

Davydov, DN ^{[1
]}

Mayou, D ^{[1
]}

Berger, C ^{[1
]}

Gignoux, C ^{[1
]}

Neumann, A ^{[1
]}

Jansen, AGM ^{[1
]}

Wyder, P ^{[1
]}

机构：

[1] CNRS,LAB ETUD PROPRIETES ELECT SOLIDES,F-38042 GRENOBLE 9,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.77.3173

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Tunneling spectroscopy studies on oxidized and bare surfaces of icosahedral i-AlPdRe, i-AlCuFe, and approximant alpha-AlMnSi phases reveal specific features of the density of states (DOS) close to the Fermi level as compared to the crystalline nonapproximant omega-AlCuFe phase. The Fermi energy lies in the middle of a narrow pseudogap of about 50 meV width. For higher energies, the DOS exhibits a square root energy dependence attributed to electron-electron interaction effects. The DOS differs from the linear muffin tin orbital calculated DOS and the possible roles of electron scattering and inhomogeneous electronic structure close to the surface are discussed.

引用

页码：3173 / 3176

页数：4

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