Transport signatures of interacting fermions in quasi-one-dimensional topological superconductors

Dganit Meidan, Alessandro Romito, and Piet W. Brouwer
Phys. Rev. B 93, 125433 – Published 29 March 2016

Abstract

A topological superconducting wire with an effective time-reversal symmetry is known to have a Z8 topological classification in the presence of interactions. The topological index |n|4 counts the number of Majorana end states, negative n corresponding to end states that are odd under time reversal. If such a wire is weakly coupled to a normal-metal lead, interactions induce a Kondo-like correlated state if |n|=4. We show that the Kondo-like state manifests itself in an anomalous temperature dependence of the zero-bias conductance and by an anomalous Fano factor for the zero-temperature normally reflected current at finite bias. We also consider the splitting of the effective Kondo resonance for weak symmetry-breaking perturbations.

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  • Received 12 December 2015

DOI:https://doi.org/10.1103/PhysRevB.93.125433

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Dganit Meidan1, Alessandro Romito2, and Piet W. Brouwer2

  • 1Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
  • 2Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany

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Issue

Vol. 93, Iss. 12 — 15 March 2016

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