Exact results for the Kondo screening cloud of two helical liquids

Thore Posske; Chao Xing Liu; Jan Carl Budich; Björn Trauzettel

doi:10.1103/PhysRevLett.110.016602

Exact results for the Kondo screening cloud of two helical liquids

Thore Posske, Chao Xing Liu, Jan Carl Budich, Björn Trauzettel

Physics

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28 Scopus citations

Abstract

We analyze the screening of a magnetic quantum dot with spin 12 coupled to two helical liquids. Interestingly, we find two qualitatively different sets of Toulouse points, i.e., nontrivial parameters for which we can solve the two channel Kondo model exactly. This enables us to calculate the temperature and voltage dependent Kondo screening cloud, which develops oscillations for an applied spin voltage μ_s. Such a spin voltage can be conveniently applied by a charge bias in a four-terminal helical liquid setup.

Original language	English (US)
Article number	016602
Journal	Physical review letters
Volume	110
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.110.016602
State	Published - Jan 2 2013

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.110.016602

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Exact results for the Kondo screening cloud of two helical liquids

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All Science Journal Classification (ASJC) codes

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