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Supercurrent reversal in Zeeman-split Josephson junctions

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dc.contributor.author GOLUBOV, A.A.
dc.contributor.author SUZUKI, S.-I.
dc.contributor.author ASANO, Y.
dc.date.accessioned 2024-04-25T12:19:55Z
dc.date.available 2024-04-25T12:19:55Z
dc.date.issued 2024
dc.identifier.citation GOLUBOV, A.A., SUZUKI, S.-I., ASANO, Y. Supercurrent reversal in Zeeman-split Josephson junctions. In: Quo Vadis – Ethics of the Scientific Research: conf. NANO-2024, event devoted to the 60th anniversary of the Technical University of Moldova, 15-18 April 2024, Chişinău, Republica Moldova: Program and proceedings of the conference, Chişinău 2024, p. 79. ISBN 978-9975-64-422-8. en_US
dc.identifier.isbn 978-9975-64-422-8
dc.identifier.uri http://repository.utm.md/handle/5014/26922
dc.description.abstract We theoretically study the current-phase relation in a Josephson junction comprising the Zeeman-split superconductors (ZSs) and a normal metal (N). We show that at low temperatures the Josephson current in the∈ ZS/N/ZS junctions exhibits a supercurrent reversal at a certain phase difference ϕc (0, π). By calculating the spectral Josephson current, we demonstrate that the band splitting due to the Zeeman interaction causes the level crossing in the spectra of the Andreev bound states and the sign reversal of the Josephson current, similar to the known case of an SFIFS junction (F is a ferromagnet, I is an insulator). Additionally, we propose an alternative method to observe the supercurrent reversal. We have demonstrated that ϕ c depends on the Rashba spin-orbit interaction in the normal segment. The spin precession of a quasiparticle due to the spin-orbit interaction modifies the energy spectra of the Andreev levels and ϕc. In experiments, the amplitude of the spin-orbit interaction is tunable by applying the gate voltage. Therefore, by measuring the CPR by tuning the spin-orbit coupling, one would be able to observe the anomalous current reversal. en_US
dc.language.iso en en_US
dc.publisher Technical University of Moldova en_US
dc.relation.ispartofseries NANO-2024 "Quo Vadis – Ethics of the Scientific Research", event devoted to the 60th anniversary of the Technical University of Moldova;15-18 April 2024, Chişinău, Republica Moldova
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject Josephson junction en_US
dc.subject Zeeman-split superconductors en_US
dc.subject Andreev levels en_US
dc.title Supercurrent reversal in Zeeman-split Josephson junctions en_US
dc.type Article en_US


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