Mapping the topological proximity-induced gap of multiterminal Josephson junctions

Abstract

Multiterminal Josephson junctions (MTJJs), devices in which a normal metal is in contact with three or more superconducting leads, have been proposed as artificial analogs of topological crystals. The topological nature of MTJJs manifests as a modulation of the quasiparticle density of states (DOS) in the normal metal that may be probed by tunneling measurements. We show that one can reveal this modulation by measuring the resistance of diffusive MTJJs with normal contacts, which shows rich structure as a function of the phase differences $\{{\varphi }_i\}$. Our approach demonstrates a simple yet powerful technique for exploring topological effects in MTJJs.

6 pages, 4 figures

References in corpus (3)

• Phase-engineering the Andreev band structure of a three-terminal Josephson junction
• Spin-degeneracy breaking and parity transitions in three-terminal Josephson junctions
• Probing the topological band structure of diffusive multiterminal Josephson junction devices with conductance measurements

Cited by in corpus (4)

• Tuning the the fundamental periodicity of the current-phase relation in multiterminal diffusive Josephson junctions
• Revisiting the adiabatic limit in ballistic multiterminal Josephson junctions
• Supercurrent tuning of the Josephson coupling energy
• Multiterminal Josephson junctions with tunable topological properties