Observation of a kink in the dispersion of f-electrons

被引：23

作者：

Durakiewicz, T. ^{[1
]}

Riseborough, P. S. ^{[2
]}

Olson, C. G. ^{[3
]}

Joyce, J. J. ^{[1
]}

Oppeneer, P. M. ^{[4
]}

Elgazzar, S. ^{[4
]}

Bauer, E. D. ^{[1
]}

Sarrao, J. L. ^{[1
]}

Guziewicz, E. ^{[5
]}

Moore, D. P. ^{[1
]}

Butterfield, M. T. ^{[6
]}

Graham, K. S. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Temple Univ, Dept Phys, Philadelphia, PA 19122 USA

[3] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[4] Uppsala Univ, Dept Phys & Mat Sci, S-75121 Uppsala, Sweden

[5] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

[6] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

EPL | 2008年 / 84卷 / 03期

基金：

瑞典研究理事会;

关键词：

D O I：

10.1209/0295-5075/84/37003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Strong interactions in correlated electron systems may result in the formation of heavy quasiparticles that exhibit kinks in their dispersion relation. Spectral weight is incoherently shifted away from the Fermi energy, but Luttinger's theorem requires the Fermi volume to remain constant. Our angle-resolved photoemission study of USb2 reveals a kink in a noncrossing 5f band, representing the first experimental observation of a kink structure in f-electron systems. The kink energy scale of 21 meV and the ultra-small peak width of 3 meV are observed. We propose the novel mechanism of renormalization of a point-like Fermi surface, and that Luttinger's theorem remains applicable. Copyright (C) EPLA, 2008

引用

页数：6

共 30 条

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