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Exact results for the Kondo screening cloud of two helical liquids

We analyze the screening of a magnetic quantum dot with spin 1/2 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.

preprint2012arXivOpen access
Thore PosskeChao-Xing LiuJan Carl BudichBjörn Trauzettel
cond-mat.mes-hall
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Open access4 authors1 topic
Imported metadata coverageMissing code, dataset, citation and institution fields are tracked without dominating the paper.Details
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Thore PosskeChao-Xing LiuJan Carl BudichBjörn Trauzettel

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