Deconfinement of majorana vortex modes produces a superconducting Landau level

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Pacholski, M. J. and Lemut, G. and Ovdat, O. and Adagideli, İnanç and Beenakker, C. W. J. (2021) Deconfinement of majorana vortex modes produces a superconducting Landau level. Physical Review Letters, 126 (22). ISSN 0031-9007 (Print) 1079-7114 (Online)

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Abstract

A spatially oscillating pair potential Δ(r)=Δ0e2iK·r with momentum K>Δ0/ v drives a deconfinement transition of the Majorana bound states in the vortex cores of a Fu-Kane heterostructure (a 3D topological insulator with Fermi velocity v, on a superconducting substrate with gap Δ0, in a perpendicular magnetic field). In the deconfined phase at zero chemical potential the Majorana fermions form a dispersionless Landau level, protected by chiral symmetry against broadening due to vortex scattering. The coherent superposition of electrons and holes in the Majorana Landau level is detectable as a local density of states oscillation with wave vector K2-(Δ0/ v)2. The striped pattern also provides a means to measure the chirality of the Majorana fermions.
Item Type: Article
Divisions: Faculty of Engineering and Natural Sciences
Depositing User: İnanç Adagideli
Date Deposited: 04 Sep 2022 12:07
Last Modified: 04 Sep 2022 12:07
URI: https://research.sabanciuniv.edu/id/eprint/43506

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