Differential Conductance and Quantum Interference in Kondo Systems

被引：86

作者：

Figgins, Jeremy ^{[1
]}

Morr, Dirk K. ^{[1
]}

机构：

[1] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 18期

关键词：

HEAVY-FERMION METALS; LARGE-N EXPANSION; PHASE-TRANSITIONS; LATTICE; ANTIFERROMAGNETISM; RESONANCE; ELECTRON; IMPURITY; MIRAGES; ALLOYS;

D O I：

10.1103/PhysRevLett.104.187202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a large-N theory for the differential conductance, dI/dV, in Kondo systems measured via scanning tunneling spectroscopy. We demonstrate that quantum interference between tunneling processes into the conduction band and into the magnetic f-electron states is crucial in determining the experimental Fano line shape of dI/dV. This allows one to uniquely extract the Kondo coupling and the ratio of the tunneling amplitudes from the experimental dI/dV curve. Finally, we show that dI/dV directly reflects the strength of the antiferromagnetic interaction in Kondo lattice systems.

引用

页数：4

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