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We determine, using a self consistent method, the charge and spin currents in ballistic Josephson junctions consisting of ferromagnetic ($F$) layers sandwiched between superconducting ($S$) electrodes ($SFS$-type junctions). When there are…

Superconductivity · Physics 2015-11-24 Klaus Halterman , Oriol T. Valls , Chien-Te Wu

We show that vortices with circulating current, related with odd-frequency triplet pairing, appear in Josephson junctions where the barrier is a weak ferromagnet with strong spin-orbit coupling. By symmetry analysis we show that there is an…

Superconductivity · Physics 2026-01-21 Dan Crawford , Stefan Ilić , Pauli Virtanen , Tero T. Heikkilä

Interference of proximity induced superconducting correlations in mesoscopic metallic rings is sensitive to the magnetic flux $\Phi$ inside these rings. This is the reason for magnetoconductance oscillations in such systems. We detected…

Superconductivity · Physics 2007-05-23 V. N. Antonov , H. Takayanagi , F. K. Wilhelm , A. D. Zaikin

Spin-polarized current effect is studied on the static and dynamic magnetization of the antiferromagnet in a ferromagnet - antiferromagnet junction. The macrospin approximation is generalized to antiferromagnets. Canted antiferromagnetic…

Materials Science · Physics 2011-06-20 E. M. Epshtein , Yu. V. Gulyaev , P. E. Zilberman

We show that a Josephson current flowing through a ferromagnet-normal-metal-ferromagnet trilayer connected to two superconducting electrodes induces an equilibrium exchange interaction between the magnetic moments of the ferromagnetic…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 Xavier Waintal , Piet W. Brouwer

We study proximity effects at ferromagnet superconductor interfaces by self-consistent numerical solution of the Bogoliubov-de Gennes equations for the continuum, without any approximations. Our procedures allow us to study systems with…

Superconductivity · Physics 2009-11-07 Klaus Halterman , Oriol T. Valls

Molecular dynamics simulations are used to show that strong magnetization significantly increases the space and time scales associated with interparticle correlations. The physical mechanism responsible is a channeling effect whereby…

Plasma Physics · Physics 2021-04-21 Keith R. Vidal , Scott D. Baalrud

At high densities fluids of strongly dipolar spherical particles exhibit spontaneous long-ranged orientational order. Typically, due to demagnetization effects induced by the long range of the dipolar interactions, the magnetization…

Soft Condensed Matter · Physics 2009-10-30 B. Groh , S. Dietrich

The spin-triplet correlations in superconducting spin valve structures arising in the presence of noncollinear textures of magnetic moment are shown to enhance strongly the electromagnetic proximity effect, i. e. the long-range leakage of…

Superconductivity · Physics 2019-08-19 Zh. Devizorova , S. V. Mironov , A. S. Mel'nikov , A. Buzdin

We present a model for fully developed triplet proximity effect in superconductor-ferromagnet heterostructures. Within the circuit-theory approximation, we evaluate the Green's functions, the density of states, and the Josephson current…

Superconductivity · Physics 2016-08-31 V. Braude , Yu. V. Nazarov

Magnetic junction is considered which consists of two ferromagnetic metal layers, a thin nonmagnetic spacer in between, and nonmagnetic lead. Theory is developed of a magnetization reversal due to spin injection in the junction.…

Materials Science · Physics 2009-11-10 R. J. Elliott , E. M. Epshtein , Yu. V. Gulyaev , P. E. Zilberman

We report on mutual proximity effects in d-wave superconductor/half-metal heterostructures which correspond to systems composed of high-Tc cuprates and manganite materials. In our study, proximity effects are induced by the interplay of two…

Superconductivity · Physics 2009-11-11 Nobukatsu Yoshida , Mikael Fogelstrom

We study the Josephson current in two types of lateral junctions with spin-orbit coupling and an exchange field. The first system (type 1 junction) consists of superconductors with heavy metal interlayers linked by a ferromagnetic bridge,…

Superconductivity · Physics 2020-01-01 B. Bujnowski , R. Biele , F. S. Bergeret

Magnetization plateaus and phase diagrams of the extended Ising model on the Shastry-Sutherland lattice with the first $(J_1)$, second $(J_2)$, third $(J_3)$ fourth $(J_4)$ and fifth $(J_5)$ nearest-neighbour spin couplings are studied by…

Statistical Mechanics · Physics 2019-02-20 Pavol Farkasovsky , Lubomira Regeciova

We consider the proximity effect in multiterminal ferromagnet superconductor (FSF) hybrid structures in which two or three electrodes are connected to a superconductor. We show that two competing effects take place in these systems: (i)…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 H. Jirari , R. Mélin , N. Stefanakis

We study fractional Josephson effect in a particle-number conserving system consisting of a quasi-one-dimensional superconductor coupled to a nanowire or an edge carrying $e/m$ fractional charge excitations with $m$ being an odd integer. We…

Mesoscale and Nanoscale Physics · Physics 2015-10-28 Meng Cheng , Roman M. Lutchyn

The induced magnetic moment, provided by the bands electrons, is calculated in a variety of Josephson junctions with multilayered ferromagnetic (F) weak link. The noncollinear magnetization of the F layers provides the conditions necessary…

Superconductivity · Physics 2015-06-11 N. G. Pugach , A. I. Buzdin

We study analytically the effect of a constant magnetic field on the dynamics of a two dimensional Josephson array. The magnetic field induces spatially dependent states and coupling between rows, even in the absence of an external load.…

chao-dyn · Physics 2009-10-28 G. Filatrella , K. Wiesenfeld

We study theoretically spontaneous currents and magnetic field induced in a superconductor-ferromagnet (S-F) bilayer due to direct and inverse proximity effects. The induced currents {are Meissner currents that appear even in the absence of…

Superconductivity · Physics 2019-04-17 A. F. Volkov , F. S. Bergeret , K. B. Efetov

Magnetization behavior of long nanowires with square cross-section under influence of strong perpendicular spin-polarized current is studied theoretically. The study is based on Landau-Lifshitz-Slonczewski phenomenology. In the no current…

Mesoscale and Nanoscale Physics · Physics 2013-06-12 Volodymyr P. Kravchuk , Oleksii M. Volkov , Denis D. Sheka , Yuri Gaididei