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We show how superconductors can be used to couple, initialize, and read out spatially separated spin qubits. When two single-electron quantum dots are tunnel coupled to the same superconductor, the singlet component of the two-electron…

Mesoscale and Nanoscale Physics · Physics 2013-09-05 Martin Leijnse , Karsten Flensberg

We study the Andreev levels, supercurrent and tunnelling conductance in a clean Ising superconductor (ISC)/half metal (HM)/Ising superconductor (ISC) Josephson junction with spin-active interfaces using Bogoliubov-de Gennes equations. We…

Superconductivity · Physics 2023-03-08 Saumen Acharjee , Arindam Boruah , Nimisha Dutta , Reeta Devi

We explore the role of proximity-induced odd-frequency pairing in the thermoelectricity of a ferromagnet when coupled to a conventional $s$-wave spin-singlet superconductor through a spin-active interface. By varying both the polarization…

Superconductivity · Physics 2020-09-18 Paramita Dutta , Kauê R. Alves , Annica M. Black-Schaffer

The inversion symmetry breaking at the interface between different materials generates a strong interfacial spin-orbit coupling (ISOC) that may influence the spin and charge transport in hybrid structures. Here we use a simple analytically…

Mesoscale and Nanoscale Physics · Physics 2017-10-04 Juan Borge , Ilya Tokatly

We theoretically analyze non-local effects in electron transport across three-terminal ballistic normal-superconducting-normal (NSN) structures with spin-active interfaces. Subgap electrons entering S-electrode from one N-metal may form…

Superconductivity · Physics 2007-12-11 Mikhail S. Kalenkov , Andrei D. Zaikin

Spin-triplet superconductivity is an intriguing quantum coherent state with both spin and orbital degrees of freedom, which holds significant potential for future applications in quantum technology. However, how the spin of the triplet…

Spin injection and detection in silicon is a difficult problem, in part because the weak spin-orbit coupling and indirect gap preclude using standard optical techniques. We propose two ways to overcome this difficulty, and illustrate their…

Other Condensed Matter · Physics 2015-06-24 Igor Zutic , Jaroslav Fabian , Steven C. Erwin

A variety of experimental observations in monolayer transition metal dichalcogenide superconductors with Ising spin-orbit coupling suggest the presence of an unconventional superconducting pairing mechanism. Some of these experiments…

Superconductivity · Physics 2026-02-05 Subhojit Roy , Andreas Kreisel , Brian M. Andersen , Shantanu Mukherjee

The existence of spin-triplet superconductivity in non-collinear magnetic heterostructures with superconductors is by now well established. This observation lays the foundation of superconducting spintronics with the aim to create a…

Superconductivity · Physics 2019-04-05 I. V. Bobkova , A. M. Bobkov , Wolfgang Belzig

We investigate the coupling between two singlet superconductors separated by a half-metallic magnet. The mechanism behind the coupling is provided by the rotation of the quasiparticle spin in the superconductor during reflection events at…

Superconductivity · Physics 2009-11-07 M. Eschrig , J. Kopu , J. C. Cuevas , Gerd Schön

In superconducting spintronics, it is essential to generate spin-triplet Cooper pairs on demand. Up to now, proposals to do so concentrate on hybrid structures in which a superconductor (SC) is combined with a magnetically ordered material…

Superconductivity · Physics 2018-01-24 Daniel Breunig , Pablo Burset , Björn Trauzettel

A superconductor with a spin-split excitation spectrum behaves as an ideal ferromagnetic spin-injector in a tunneling junction. It was theoretical predicted that the combination of two such spin-split superconductors with independently…

Superconductivity · Physics 2018-10-18 G. De Simoni , E. Strambini , J. S. Moodera , F. S. Bergeret , F. Giazotto

The increased capabilities of coupling more and more materials through functional interfaces are paving the way to a series of exciting experiments and extremely advanced devices. Here we focus on the capability of magnetically…

At the interface between a ferromagnetic insulator and a superconductor there is a coupling between the spins of the two materials. We show that when a supercurrent carried by triplet Cooper pairs flows through the superconductor, the…

Mesoscale and Nanoscale Physics · Physics 2021-11-16 Lina G. Johnsen , Haakon T. Simensen , Arne Brataas , Jacob Linder

We address the tunneling conductance and spin inelastic tunneling spectroscopy of localized paramagnetic moments in a superconducting environment, pertaining to recent measurements on Fe-octaethylporphyrin-chloride using superconducting…

Mesoscale and Nanoscale Physics · Physics 2015-05-29 P. Berggren , J. Fransson

The proximity-induced spin-triplet $f$-wave symmetry pairing in a monolayer molybdenum disulfide-superconductor hybrid features an interesting electron-hole excitations and also effective superconducting subgap, giving rise to a distinct…

Mesoscale and Nanoscale Physics · Physics 2017-03-08 Hadi Goudarzi , Maryam Khezerlou , Hasan Sedghi , Afifeh Ghorbai

It has been recognized that the condensation of spin-triplet Cooper pairs requires not only the broken gauge symmetry but also the spin ordering as well. One consequence of this is the possibility of the Cooper-pair spin current analogous…

Superconductivity · Physics 2018-10-24 Suk Bum Chung , Se Kwon Kim , Ki Hoon Lee , Yaroslav Tserkovnyak

We investigate the proximity effect in diffusive superconducting hybrid structures with a spin-orbit (SO) coupling. Our study is focused on the singlet-triplet conversion and the generation of long-range superconducting correlations in…

Superconductivity · Physics 2015-06-18 F. S. Bergeret , I. V. Tokatly

In all known fermionic superfluids, Cooper pairs are composed of spin-1/2 quasi-particles that pair to form either spin-singlet or spin-triplet bound states. The "spin" of a Bloch electron, however, is fixed by the symmetries of the crystal…

The coupling of two s-wave superconductors through a small magnetic dot is discussed. Assuming that the dot charging energy is small compared to the superconducting gap, $E_c\ll \Delta$, and that the moment of the dot is classical, we…

Superconductivity · Physics 2009-11-07 M. Andersson , J. C. Cuevas , M. Fogelstrom