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Condensed Matter > Superconductivity
Title: Magnetic-field-free nonreciprocal transport in graphene multi-terminal Josephson junctions
(Submitted on 12 Jan 2023 (v1), last revised 13 Feb 2024 (this version, v3))
Abstract: Nonreciprocal superconducting devices have attracted growing interest in recent years as they potentially enable directional charge transport for applications in superconducting quantum circuits. Specifically, the superconducting diode effect has been explored in two-terminal devices that exhibit superconducting transport in one current direction while showing dissipative transport in the opposite direction. Here, we exploit multi-terminal Josephson junctions (MTJJs) to engineer magnetic-field-free nonreciprocity in multi-port networks. We show that when treated as a two-port electrical network, a three-terminal Josephson junction (JJ) with an asymmetric graphene region exhibits reconfigurable two-port nonreciprocity. We observe nonreciprocal (reciprocal) transport between superconducting terminals with broken (preserved) spatial mirror symmetry. We explain our observations by considering a circuit-network of JJs with different critical currents.
Submission history
From: Morteza Kayyalha [view email][v1] Thu, 12 Jan 2023 15:30:07 GMT (3269kb,D)
[v2] Sat, 17 Jun 2023 20:10:33 GMT (2751kb,D)
[v3] Tue, 13 Feb 2024 18:32:25 GMT (5278kb,D)
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