Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 71: Poster Session: Graphene / Topological Insulators / Interfaces and Surfaces

HL 71.22: Poster

Mittwoch, 28. März 2012, 16:00–19:00, Poster D

Kondo Tunneling between 1D Helical Liquids — •Thore Posske, Chao-Xing Liu, Jan Carl Budich, and Björn Trauzettel — Institute for Theoretical Physics and Astrophysics, University of Wuerzburg

Two non-interacting helical edge liquids are coupled via a magnetic impurity. Different chemical potentials are attached to every Fermion species to imitate a four terminal setup and drive the system out of equilibrium. In a special limit of the coupling constants, the Toulouse limit, the system is mapped to a non-interacting one using Bosonization and Refermionization. We explicitly calculate the spatially dependent Kondo screening cloud that is emerging in the edge channels. This allows us to show how the helicity can be used to gain additional information about the Kondo cloud using transport measurements.