The dual nature of 5f electrons and the origin of heavy fermions in U compounds

被引：77

作者：

Zwicknagl, G

Fulde, P

机构：

[1] Tech Univ Braunschweig, Inst Math Phys, D-38106 Braunschweig, Germany

[2] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2003年 / 15卷 / 28期

关键词：

D O I：

10.1088/0953-8984/15/28/302

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We develop a theory for the electronic excitations in UPt3 which is based on the localization of two of the 5f electrons. The remaining f electron is delocalized and acquires a large effective mass by inducing intra-atomic excitations of the localized ones. The measured de Haas-van Alphen frequencies of the heavy quasiparticles are explained as well as their anisotropic heavy mass. A model calculation for a small cluster reveals why only the largest of the different 5f hopping matrix elements is operative, causing the electrons in other orbitals to localize.

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页码：S1911 / S1916

页数：6

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