Blar i Fakultet for naturvitenskap (NV) på tidsskrift "Physical Review B. Condensed Matter and Materials Physics"
Viser treff 21-40 av 57
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Magnetization dynamics and Majorana fermions in ferromagnetic Josephson junctions along the quantum spin Hall edge
(Journal article; Peer reviewed, 2011)We investigate the interplay between ferromagnetic and superconducting order at the edge of a quantum spin Hall insulator. Using complementary analytical and self-consistent numerical approaches, we study a ferromagnetic ... -
Majorana fermions in spin-orbit-coupled ferromagnetic Josephson junctions
(Journal article; Peer reviewed, 2011)We study all possible Majorana modes in two-dimensional spin-orbit-coupled ferromagnetic superconductor–normal state–superconductor (SNS) Josephson junctions and propose experiments to detect them. With the S region in a ... -
Majorana fermions manifested as interface states in semiconductor hybrid structures
(Journal article; Peer reviewed, 2010)Motivated by recent proposals for the generation of Majorana fermions in semiconducting hybrid structures, we examine possible experimental fingerprints of such excitations. Whereas previous works mainly have focused on ... -
Meissner effect probing of odd-frequency triplet pairing in superconducting spin valves
(Journal article, 2014)Superconducting correlations which are long ranged in magnetic systems have attracted much attention due to their spin-polarization properties and potential use in spintronic devices. Whereas experiments have demonstrated ... -
Origin of ferroelectric polarization in tetragonal tungsten-bronze-type oxides
(Journal article; Peer reviewed, 2016)The origin of ferroelectric polarization in tetragonal tungsten-bronze- (TTB-) type oxide strontium barium niobate (SBN) is investigated using first-principles density functional calculations. We study in particular the ... -
Phase-controlled proximity effect in ferromagnetic Josephson junctions: Calculation of the density of states and the electronic specific heat
(Journal article; Peer reviewed, 2010)We study the thermodynamic properties of a dirty ferromagnetic S|F|S Josephson junction with s-wave superconducting leads in the low-temperature regime. We employ a full numerical solution with a set of realistic parameters ... -
phi-state and inverted Fraunhofer pattern in nonaligned Josephson junctions
(Journal article; Peer reviewed, 2013)A generic nonaligned Josephson junction in the presence of an external magnetic field is theoretically considered and an unusual flux-dependent current-phase relation (CPR) is revealed. We explain the origin of the anomalous ... -
Pressure-induced 0-π transitions and supercurrent crossover in antiferromagnetic weak links
(Journal article, 2013)We compute self-consistently the Josephson current in a superconductor-antiferromagnet-superconductor junction using a lattice model, focusing on 0−π transitions occurring when the width of the antiferromagnetic region ... -
Probing defects in Al-Mg-Si alloys using muon spin relaxation
(Journal article; Peer reviewed, 2012)Muon spin methods are very sensitive to nanoscale defects such as trace elements and vacancies in metals. This sensitivity is required when investigating Al-Mg-Si alloys, a complicated system in which diffusion-controlled ... -
Proximity effect with noncentrosymmetric superconductors
(Journal article, 2012)We describe the superconducting proximity effect taking place in a contact between a noncentrosymmetric superconductor and a diffusive normal/ferromagnetic metal within the quasiclassical theory of superconductivity. By ... -
Pure spin current generated by reflection at a normal metal/two-dimensional electron gas interface
(Journal article; Peer reviewed, 2010)The concept of a spin current is a useful tool in understanding spin transport in hybrid systems but its very definition is problematic in systems where spin-orbit coupling effects are strong. In the absence of spin-dependent ... -
Quantum Ground State Control in Superconductor-Silicene Structures: 0-π transitions, φ₀-junctions, and Majorana bound states
(Journal article, 2016)We demonstrate theoretically that proximity-induced superconductivity in silicene offers the possibility to exert strong quantum ground state control. We show that electrically controlled 0-π transitions occur in Josephson ... -
Quasiclassical theory for the superconducting proximity effect in Dirac materials
(Journal article, 2017)We derive the quasiclassical non-equilibrium Eilenberger and Usadel equations to first order in quantities small compared to the Fermi energy, valid for Dirac edge and surface electrons with spin-momentum locking p· σ¯, ... -
Reversal and termination of current-induced domain wall motion via magnonic spin-transfer torque
(Journal article; Peer reviewed, 2012)We investigate the domain wall dynamics of a ferromagnetic wire under the combined influence of a spin-polarized current and magnonic spin-transfer torque generated by an external field, taking also into account Rashba ... -
Signature of odd-frequency pairing correlations induced by a magnetic interface
(Journal article; Peer reviewed, 2010)We investigate the mutual proximity effect in a normal metal contacted to a superconductor through a magnetic interface. Analytical and self-consistent numerical results are presented, and we consider both the diffusive ... -
Singlet-triplet superconducting quantum magnetometer
(Journal article, 2013)Motivated by the recent experimental realization of a quantum interference transistor based on the superconducting proximity effect, we here demonstrate that the inclusion of a textured ferromagnet both strongly enhances ... -
Spin caloritronics with superconductors: Enhanced thermoelectric effects, generalized Onsager response-matrix, and thermal spin currents
(Journal article, 2016)It has recently been proposed and experimentally demonstrated that it is possible to generate large thermoelectric effects in ferromagnet/superconductor structures due to a spin-dependent particle-hole asymmetry. Here, we ... -
Spin Hall effect and spin swapping in diffusive superconductors
(Journal article; Peer reviewed, 2017)We consider the spin-orbit-induced spin Hall effect and spin swapping in diffusive superconductors. By employing the nonequilibrium Keldysh Green's function technique in the quasiclassical approximation, we derive coupled ... -
Spin pumping and inverse spin Hall voltages from dynamical antiferromagnets
(Journal article; Peer reviewed, 2017)Dynamical antiferromagnets can pump spins into adjacent conductors. The high antiferromagnetic resonance frequencies represent a challenge for experimental detection, but magnetic fields can reduce these resonance frequencies. ... -
Spin pumping, dissipation, and direct and alternating inverse spin Hall effects in magnetic-insulator/normal-metal bilayers
(Journal article; Peer reviewed, 2017)We theoretically consider the spin-wave mode- and wavelength-dependent enhancement of the Gilbert damping in magnetic insulator–normal metal bilayers due to spin pumping as well as the enhancement's relation to direct and ...