Supercurrent Reversal in Two-Dimensional Topological Insulators

Alexander Zyuzin; Mohammad Alidoust; Jelena Klinovaja; Daniel Loss

doi:10.1103/physrevb.92.174515

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arXiv · 1507.05089

Supercurrent Reversal in Two-Dimensional Topological Insulators

Alexander Zyuzin·Mohammad Alidoust·Jelena Klinovaja·Daniel Loss

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Abstract

We calculate supercurrent across a two-dimensional topological insulator subjected to an external magnetic field. When the edge states of a narrow two-dimensional topological insulator are hybridized, an external magnetic field can close the hybridization gap, thus driving a quantum phase transition from insulator to semimetal states of the topological insulator. We find a sign reversal of the supercurrent at the quantum phase transition revealing intrinsic properties of topological insulators via Josephson effect.

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Alexander Zyuzin, Mohammad Alidoust, Jelena Klinovaja, Daniel Loss. 2015-10-21. Supercurrent Reversal in Two-Dimensional Topological Insulators. https://doi.org/10.1103/physrevb.92.174515

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