Supercurrent Reversal in Two-Dimensional Topological Insulators
Alexander A. Zyuzin, Mohammad Alidoust, Jelena Klinovaja, and Daniel Loss
Phys. Rev. B 92, 174515 (2015). [PDF]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.
