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We characterize the superconducting diode effect (SDE) in two-dimensional diffusive structures with Rashba spin-orbit coupling using the quasiclassical formalism. We consider both homogeneous superconductors and Josephson junctions. In the…

Superconductivity · Physics 2024-11-04 Stefan Ilic , Pauli Virtanen , Daniel Crawford , Tero T. Heikkilä , F. Sebastian Bergeret

We study the heat conductance of hybrid superconducting junctions. Our analysis involves single-channel junctions with arbitrary transmission as well as diffusive connectors and shows the influence of the superconducting gaps and phases of…

Mesoscale and Nanoscale Physics · Physics 2019-07-02 Fatemeh Hajiloo , Fabian Hassler , Janine Splettstoesser

We study coherent transport through a semiconductor nanowire in the presence of spin-orbit coupling and Zeeman splitting due to an applied magnetic field. By employing analytical and numerical techniques we develop a theory for the…

Mesoscale and Nanoscale Physics · Physics 2012-10-26 Meng Cheng , Roman M. Lutchyn

Mesoscopic superconducting-normal-metal-superconducting (S-N-S) junctions with a large separation between the superconducting electrodes (i.e. wide junctions) exhibit nonequilibrium supercurrents, even at temperatures for which the…

Superconductivity · Physics 2009-10-31 Nathan Argaman

We report the results of several nonequilibrium experiments performed on superconducting/normal/superconducting (S/N/S) Josephson junctions containing either one or two extra terminals that connect to normal reservoirs. Currents injected…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 M. S. Crosser , Jian Huang , F. Pierre , Pauli Virtanen , Tero T. Heikkilä , F. K. Wilhelm , Norman O. Birge

We study the Josephson effect in a trijunction formed by two topological superconductor (TS) wires and a conventional $s$-wave superconductor. Using a boundary Green's function formalism, analytical results for the current-phase relation…

Mesoscale and Nanoscale Physics · Physics 2017-07-28 A. Zazunov , R. Egger , M. Alvarado , A. Levy Yeyati

Josephson effect in junctions of quasi one-dimensional triangular lattice superconductors is discussed, where the theoretical model corresponds to organic superconductors (TMTSF)_2PF_6. We assume the quarter-filling electron band and p, d…

Superconductivity · Physics 2009-11-10 Y. Asano , Y. Tanaka , Y. Tanuma , K. Kuroki , H. Tsuchiura

A formula for the Josephson current between two superconductors with anisotropic pairing symmetries is derived based on the mean-field theory of superconductivity. Zero-energy states formed at the junction interfaces is one of basic…

Superconductivity · Physics 2009-11-07 Yasuhiro Asano

We study the spin nutation effects of the molecular nanomagnet on the Josephson current through a superconductor$|$molecular nanomagnet$|$superconductor tunnel junction. We explicitly demonstrate that due to the spin nutation of the…

Mesoscale and Nanoscale Physics · Physics 2015-06-17 J. Abouie , B. Abdollahipour , A. A. Rostami

The conventional Josephson effect may be modified by introducing spin-active scattering in the interface-layer of the junction. Here, we discuss a Josephson junction consisting of two s-wave superconducting leads coupled over a classical…

Superconductivity · Physics 2016-03-07 Cecilia Holmqvist , Wolfgang Belzig , Mikael Fogelström

The Josephson effect is a manifestation of the macroscopic phase coherence of superconductors and superfluids. We propose that with ultracold Fermi gases one can realise a spin-asymmetric Josephson effect in which the two spin components of…

Quantum Gases · Physics 2010-12-10 M. O. J. Heikkinen , F. Massel , J. Kajala , M. J. Leskinen , G. -S. Paraoanu , P. Torma

We propose and analyze a mesoscopic Josephson junction consisting of two ferromagnetic insulator-superconductors (FI-Ss) coupled through a normal metal (N) layer. The Josephson current of the junction is non-trivially affected by the…

Mesoscale and Nanoscale Physics · Physics 2017-08-28 E. Strambini , F. S. Bergeret , F. Giazotto

We analyze theoretically the influence of domain walls (DWs) on the DC Josephson current in magnetic superconducting S$_{m}$/Fl/F/Fl/S$_{m}$ junctions. The Josephson junction consists of two "magnetic" superconductors S$_{m}$…

Superconductivity · Physics 2022-04-06 Samme M. Dahir , Anatoly F. Volkov , Ilya M. Eremin

We carry out an extensive experimental and theoretical study of the Josephson effect in S-N-S junctions made of a diffusive normal metal (N) embedded between two superconducting electrodes (S). Our experiments are performed on Nb-Cu-Nb…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 P. Dubos , H. Courtois , B. Pannetier , F. K. Wilhelm , A. D. Zaikin , G. Schon

We study the supercurrent in quasi-one-dimensional Josephson junctions with a weak link involving magnetism, either via magnetic impurities or via ferromagnetism. In the case of weak links longer than {\color{black}the magnetic…

Mesoscale and Nanoscale Physics · Physics 2018-12-24 P. A. Ioselevich , P. M. Ostrovsky , Ya. V. Fominov

We present an analysis of the symmetries of the interference pattern of critical currents through a two-dimensional superconductor-semiconductor-superconductor junction, taking into account Rashba and Dresselhaus spin-orbit interaction, an…

Mesoscale and Nanoscale Physics · Physics 2016-04-13 Asbjørn Rasmussen , Jeroen Danon , Henri Suominen , Fabrizio Nichele , Morten Kjaergaard , Karsten Flensberg

We consider the effect of the Rashba spin-orbital interaction and space charge in a ferromagnet-insulator/semiconductor/insulator-ferromagnet junction where the spin current is severely affected by the doping, band structure and charge…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Wei Wu , Jinbin Li , Yue Yu , S. T. Chui

We report on transport properties of Josephson junctions in hybrid superconducting-topological insulator devices, which show two striking departures from the common Josephson junction behavior: a characteristic energy that scales inversely…

In a Josephson junction, the supercurrent is determined by both the discrete sub-gap part of the spectrum due to Andreev bound states and the continuous part of the spectrum from energy states outside the superconducting gap. We consider…

Superconductivity · Physics 2025-02-12 Alex Levchenko

In this paper we address several new developments in the theory of dc Josephson effect in superconducting weak links. We analyze an interplay between quantum interference effects and Andreev reflection in SNS nanojunctions with insulating…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Andrei D. Zaikin