Wireless Majorana Fermions: From Magnetic Tunability to Braiding

ORAL

Abstract

We propose a versatile platform to investigate the existence of zero-energy Majorana fermions (MFs) and their non-Abelian statistics through braiding [1]. This implementation combines a two-dimensional electron gas formed in a semiconductor quantum well grown on the surface of an $s$-wave superconductor, with a nearby array of magnetic tunnel junctions (MTJs). The underlying magnetic textures produced by MTJs provide highly-controllable topological phase transitions to confine and transport MFs in two dimensions, overcoming the requirement for a network of wires.\\ &[1&] G. Fatin, A. Matos-Abiague, B. Scharf, and I. \v{Z}uti\'c, arXiv e-prints (2015), arXiv:1510.08182v1.

*This work has been supported by ONR Grant N000141310754 and U.S. DOE BES Award DE-SC0004890.

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Authors

  • Geoffrey Fatin

    • University at Buffalo - SUNY

  • Alex Matos-Abiague

    • State University of New York at Buffalo
    • University at Buffalo - SUNY
    • University at Buffalo

  • Benedikt Scharf

    • State Univ of NY - Buffalo
    • State University of New York at Buffalo
    • University at Buffalo - SUNY

  • Igor Zutic

    • University at Buffalo
    • State University of New York at Buffalo
    • SUNY at Buffalo
    • Dept. of Physics, University at Buffalo, State University of New York
    • University at Buffalo - SUNY
    • SUNY Buffalo