Quantum phase transition between one-channel and two-channel Kondo polarons

Julián Rincón, Daniel J. García, K. Hallberg, Matthias Vojta

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

For a mobile spin-1/2 impurity, coupled antiferromagnetically to a one-dimensional gas of fermions, perturbative ideas have been used to argue in favor of two-channel Kondo behavior of the impurity spin. Here we combine general considerations and extensive numerical simulations to show that the problem displays a novel quantum phase transition between two-channel and one-channel Kondo screening upon increasing the Kondo coupling. We construct a ground-state phase diagram and discuss the various nontrivial crossovers as well as possible experimental realizations.

Original languageEnglish (US)
Article number140407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number14
DOIs
StatePublished - Oct 31 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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