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Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry
Simon Reinhardt, Tim Ascherl, Andreas Costa +9
In Josephson diodes the asymmetry between positive and negative current branch of the current-phase relation leads to a polarity-dependent critical current and Josephson inductance…
Microscopic study of the Josephson supercurrent diode effect in Josephson junctions based on two-dimensional electron gas
Andreas Costa, Jaroslav Fabian, Denis Kochan
Superconducting systems that simultaneously lack space-inversion and time-reversal symmetries have recently been the subject of a flurry of experimental and theoretical research ac…
Sign reversal of the AC and DC supercurrent diode effect and 0--like transitions in ballistic Josephson junctions
Andreas Costa, Christian Baumgartner, Simon Reinhardt +9
The recent discovery of intrinsic supercurrent diode effect, and its prompt observation in a rich variety of systems, has shown that nonreciprocal supercurrents naturally emerge wh…
Effect of Rashba and Dresselhaus spin-orbit coupling on supercurrent rectification and magnetochiral anisotropy of ballistic Josephson junctions
Christian Baumgartner, Lorenz Fuchs, Andreas Costa +11
Simultaneous breaking of inversion- and time-reversal symmetry in Josephson junction leads to a possible violation of the equality for the current-phase relation. Thi…
Superconducting triplet pairings and anisotropic magnetoresistance effects in ferromagnet/superconductor/ferromagnet double-barrier junctions
Andreas Costa, Jaroslav Fabian
Ferromagnetic spin valves offer the key building blocks to integrate giant- and tunneling-magnetoresistance effects into spintronics devices. Starting from a generalized Blonder-Ti…
A Josephson junction supercurrent diode
Christian Baumgartner, Lorenz Fuchs, Andreas Costa +10
Transport is called nonreciprocal when not only the sign, but also the absolute value of the current, depends on the polarity of the applied voltage. It requires simultaneously bro…
Signatures of superconducting triplet pairing in Ni--Ga-bilayer junctions
Andreas Costa, Madison Sutula, Valeria Lauter +3
Ni-Ga bilayers are a versatile platform for exploring the competition between strongly antagonistic ferromagnetic and superconducting phases. We characterize the impact of this com…
Anomalous Josephson Hall effect charge and transverse spin currents in superconductor/ferromagnetic insulator/superconductor junctions
Andreas Costa, Jaroslav Fabian
Interfacial spin-orbit coupling in Josephson junctions offers an intriguing way to combine anomalous Hall and Josephson physics in a single device. We study theoretically how the s…
Skew Andreev reflection in ferromagnet/superconductor junctions
Andreas Costa, Alex Matos-Abiague, Jaroslav Fabian
Andreev reflection (AR) in ferromagnet/superconductor junctions is an indispensable spectroscopic tool for measuring spin polarization. We study theoretically how the presence of a…
Interfacial Spin-Orbit Coupling: New Platform for Superconducting Spintronics
Isidoro Martínez, Petra Högl, César González-Ruano +8
Spin-orbit coupling (SOC) is a key interaction in spintronics, allowing an electrical control of spin or magnetization and, vice versa, a magnetic control of electrical current. Ho…
Connection between zero-energy Yu-Shiba-Rusinov states and 0- transitions in magnetic Josephson junctions
Andreas Costa, Jaroslav Fabian, Denis Kochan
We study the bound state spectrum and 0- transitions in ballistic quasi-1D superconductor/ferromagnetic insulator/superconductor (S/FI/S) Josephson junctions. In addition to the…
Magnetoanisotropic Josephson effect due to interfacial spin-orbit fields in superconductor/ferromagnet/superconductor junctions
Andreas Costa, Petra Högl, Jaroslav Fabian
We study theoretically the effects of interfacial Rashba and Dresselhaus spin-orbit coupling in superconductor/ferromagnet/superconductor (S/F/S) Josephson junctions---with allowin…
Magnetoanisotropic Andreev Reflection in Ferromagnet/Superconductor Junctions
Petra Högl, Alex Matos-Abiague, Igor Žutić +1
Andreev reflection spectroscopy of ferromagnet/superconductor (FS) junctions is an important probe of spin polarization. We theoretically investigate spin-polarized transport in FS…