Chain of Majorana States from Superconducting Dirac Fermions at a Magnetic Domain Wall

Titus Neupert, Shigeki Onoda, and Akira Furusaki
Phys. Rev. Lett. 105, 206404 – Published 12 November 2010

Abstract

We study theoretically a strongly type-II s-wave superconducting state of two-dimensional Dirac fermions in proximity to a ferromagnet having in-plane magnetization. It is shown that a magnetic domain wall can host a chain of equally spaced vortices in the superconducting order parameter, each of which binds a Majorana-fermion state. The overlap integral of neighboring Majorana states is sensitive to the position of the chemical potential of the Dirac fermions. Thermal transport and scanning tunneling microscopy experiments to probe the Majorana fermions are discussed.

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  • Received 6 August 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.206404

© 2010 The American Physical Society

Authors & Affiliations

Titus Neupert1,2, Shigeki Onoda2, and Akira Furusaki2

  • 1Condensed Matter Theory Group, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
  • 2Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan

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Issue

Vol. 105, Iss. 20 — 12 November 2010

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