Non-Kondo many-body physics in a Majorana-based Kondo type system

Ian Van Beek, Bernd Braunecker

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We carry out a theoretical analysis of a prototypical Majorana system, which demonstrates the existence of a Majorana-mediated many-body state and an associated intermediate low-energy fixed point. Starting from two Majorana bound states, hosted by a Coulomb-blockaded topological superconductor and each coupled to a separate lead, we derive an effective low-energy Hamiltonian, which displays a Kondo-like character. However, in contrast to the Kondo model which tends to a strong- or weak-coupling limit under renormalization, we show that this effective Hamiltonian scales to an intermediate fixed point, whose existence is contingent upon teleportation via the Majorana modes. We conclude by determining experimental signatures of this fixed point, as well as the exotic many-body state associated with it.
Original languageEnglish
Article number115416
Number of pages7
JournalPhysical Review. B, Condensed matter and materials physics
Volume94
Issue number11
Early online date12 Sept 2016
DOIs
Publication statusPublished - 15 Sept 2016

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