Revealing Topological Superconductivity in Extended Quantum Spin Hall Josephson Junctions
Shu-Ping Lee, Karen Michaeli, Jason Alicea, Amir Yacoby
DOI 10.1103/PhysRevLett.113.197001 · Physical Review Letters
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Abstract
Quantum spin Hall–superconductor hybrids are promising sources of topological superconductivity and Majorana modes, particularly given recent progress on HgTe and InAs/GaSb. We propose a new method of revealing topological superconductivity in extended quantum spin Hall Josephson junctions supporting “fractional Josephson currents.” Specifically, we show that as one threads magnetic flux between the superconductors, the critical current traces an interference pattern featuring sharp fingerprints of topological superconductivity—even when noise spoils parity conservation.
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