Renormalization group approach for the scattering off a single Rashba impurity in a helical liquid

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • François Crépin - , Julius-Maximilians-Universität Würzburg (Autor:in)
  • Jan Carl Budich - , Julius-Maximilians-Universität Würzburg (Autor:in)
  • Fabrizio Dolcini - , Polytechnic University of Turin (Autor:in)
  • Patrik Recher - , Technische Universität Braunschweig (Autor:in)
  • Björn Trauzettel - , Julius-Maximilians-Universität Würzburg (Autor:in)

Abstract

The occurrence of two-particle inelastic backscattering has been conjectured in helical edge states of topological insulators and is expected to alter transport. Here, by using a renormalization group approach, we provide a microscopic derivation of this process, in the presence of a time-reversal invariant Rashba impurity potential. We are able to prove that such an effect only occurs in the presence of electron-electron interactions. Furthermore, we find that the linear conductance as a function of temperature exhibits a crossover between two scaling behaviors, T4K for K 1/2 and T8K -2 for K<1/2, with K the Luttinger parameter.

Details

OriginalspracheEnglisch
Aufsatznummer121106
FachzeitschriftPhysical Review B - Condensed Matter and Materials Physics
Jahrgang86
Ausgabenummer12
PublikationsstatusVeröffentlicht - 19 Sept. 2012
Peer-Review-StatusJa
Extern publiziertJa