Kondo Resonance in the Anderson Model with Orbital Degrees of Freedom

被引：0

作者：

Zhuravlev, A. K. ^{[1
]}

Irkhin, V. Yu. ^{[1
]}

Katsnelson, M. I. ^{[2
]}

Lichtenstein, A. I. ^{[3
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia

[2] Univ Nijmegen, NL-6525 ED Nijmegen, Netherlands

[3] Univ Hamburg, Inst Theoret Phys, D-20355 Hamburg, Germany

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2005年 / 100卷

关键词：

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Low-energy spectral function in the general two-band Anderson model is investigated within the numerical renormalization group (NRG) calculations. The Abrikosov-Suhl resonance turns out to be essentially asymmetric for the model with one electron per impurity (quarter-filling case) in contrast with the one-band case. An external magnetic (pseudomagnetic) field breaking spin (orbital) degeneracy leads to asymmetric splitting and essential broadening of the many-body resonance. Unlike the standard Anderson model, for not-too-small hybridization the "spin up" Kondo peak, owing to orbital degrees of freedom, is not suppressed by magnetic field, but is pinned against the Fermi level.

引用

页码：S14 / S17

页数：4

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