Blar i Institutt for fysikk på tidsskrift "Physical review B (PRB)"
Viser treff 1-20 av 71
-
Andreev reflection in altermagnets
(Journal article; Peer reviewed, 2023)Recent works have predicted materials featuring bands with a large spin-splitting distinct from ferromagnetic and relativistically spin-orbit-coupled systems. Materials displaying this property are known as altermagnets ... -
Antiferromagnetic magnons as highly squeezed Fock states underlying quantum correlations
(Peer reviewed; Journal article, 2019)Employing the concept of two-mode squeezed states from quantum optics, we demonstrate a revealing physical picture for the antiferromagnetic ground state and excitations. Superimposed on a Néel ordered configuration, a ... -
Cavity-mediated superconductor–ferromagnetic-insulator coupling
(Peer reviewed; Journal article, 2023)A recent proof of concept showed that cavity photons can mediate superconducting (SC) signatures to a ferromagnetic insulator (FI) over a macroscopic distance [A. T. G. Janssønn et al., Phys. Rev. B 102, 180506(R) (2020)]. ... -
Charge and spin textures of Ising quantum Hall ferromagnet domain walls
(Journal article; Peer reviewed, 2019)We investigate the charge and spin structures associated with arbitrary smooth polarization textures in Ising (integer) quantum Hall ferromagnets. We consider the case where the two polarizations (denoted “pseudospin” up ... -
Chiral ferromagnetism beyond Lifshitz invariants
(Peer reviewed; Journal article, 2020)We consider a contribution w ch to the micromagnetic energy density that is linear with respect to the first spatial derivatives of the local magnetization direction. For a generalized two-dimensional Rashba ferromagnet, ... -
Combined Zeeman and orbital effect on the Josephson effect in rippled graphene
(Peer reviewed; Journal article, 2020)The two-dimensional nature of graphene Josephson junctions offers the possibility of creating effective superconductor-ferromagnet-superconductor junctions with tunable Zeeman splitting caused by an in-plane magnetic field. ... -
Comparison of optical response from DFT random phase approximation and a low-energy effective model: Strained phosphorene
(Peer reviewed; Journal article, 2021)The engineering of the optical response of materials is a paradigm that demands microscopic-level accuracy and reliable predictive theoretical tools. Here we compare and contrast the dispersive permittivity tensor, using ... -
Complete magnetic control over the superconducting thermoelectric effect
(Peer reviewed; Journal article, 2022)Giant thermoelectric effects are known to arise at the interface between superconductors and strongly polarized ferromagnets, enabling the construction of efficient thermoelectric generators. We predict that the thermopower ... -
Constrained s-wave weak-coupling superconductivity in multiband superconductors
(Peer reviewed; Journal article, 2023)We consider superconductivity in a system with N Fermi surfaces, including intraband and interband effective electron-electron interactions. The effective interaction is described by an N × N matrix whose elements are ... -
Controllable vortex loops in superconducting proximity systems
(Journal article; Peer reviewed, 2019)Superconducting vortex loops have so far avoided experimental detection despite being the focus of much theoretical work. We here propose a method of creating controllable vortex loops in the superconducting condensate ... -
Current-driven skyrmion depinning in magnetic granular films
(Peer reviewed; Journal article, 2019)We consider current-driven motion of magnetic skyrmions in granular magnetic films. The study uses micromagnetic modeling and phenomenological analysis based on the Thiele formalism. Remarkably, the disorder enhances the ... -
Curvature-induced long-range supercurrents in diffusive superconductor-ferromagnet-superconductor Josephson junctions with a dynamic 0−π transition
(Peer reviewed; Journal article, 2021)We report that spin supercurrents can be induced in diffusive superconductor-ferromagnet-superconductor Josephson junctions without any magnetic misalignment or intrinsic spin-orbit coupling. Instead, the pathway to ... -
Density functional and classical simulations of liquid and glassy selenium
(Peer reviewed; Journal article, 2020)Molecular dynamics simulations of liquid and glassy selenium have been carried out using density functional (400–773 K, 600 atoms) and classical force field (290–500 K, 5488 atoms) methods. Structural features (structure ... -
Direct and inverse superspin Hall effect in two-dimensional systems: Electrical detection of spin supercurrents
(Journal article; Peer reviewed, 2019)A useful experimental signature of the ordinary spin Hall effect is the spin accumulation it produces at the sample edges. The superspin Hall current [Phys. Rev. B 96, 094512 (2017)] is a transverse equilibrium spin current ... -
Disentangling electron-boson interactions on the surface of a familiar ferromagnet
(Peer reviewed; Journal article, 2024)We report energy renormalizations from electron-phonon and electron-magnon interactions in spin minority surface resonances on Ni(111). The different interactions are identified, disentangled, and quantified from the ... -
Dominant superconducting correlations in a Luttinger liquid induced by spin fluctuations
(Peer reviewed; Journal article, 2022)We study spin-fluctuation mediated divergent superconducting fluctuations in a Luttinger liquid proximity-coupled to a spin chain. Our study provides insight into how spin fluctuations can induce superconductivity in a ... -
Effect of midgap states on the magnetic exchange interaction mediated by a d-wave superconductor
(Peer reviewed; Journal article, 2021)We theoretically study the indirect interaction between two ferromagnetic contacts located on the surface of a d-wave superconductor. When the magnets are connected to a {010} edge of the superconductor we find an oscillating ... -
Electron localization in recrystallized models of the Ge2Sb2Te5 phase-change memory material
(Peer reviewed; Journal article, 2022)Understanding the relation between the structural disorder in the atomic geometry of the recrystallized state of phase-change memory materials and the localized states in the electronic structure is necessary not only for ... -
Electron-magnon coupling and quasiparticle lifetimes on the surface of a topological insulator
(Peer reviewed; Journal article, 2021)The fermionic self-energy on the surface of a topological insulator proximity coupled to ferro- and antiferromagnetic insulators is studied. An enhanced electron-magnon coupling is achieved by allowing the electrons on the ... -
Eliashberg study of superconductivity induced by interfacial coupling to antiferromagnets
(Peer reviewed; Journal article, 2021)We perform Eliashberg calculations for magnon-mediated superconductivity in a normal metal, where the electron-magnon interaction arises from interfacial coupling to antiferromagnetic insulators. In agreement with previous ...