Blar i NTNU Open på forfatter "Linder, Jacob"
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Current Control of Magnetism in Two-Dimensional Fe3GeTe2
Johansen, Øyvind; Risinggård, Vetle Kjær; Sudbø, Asle; Linder, Jacob; Brataas, Arne (Journal article; Peer reviewed, 2019)The recent discovery of magnetism in two-dimensional van der Waals systems opens the door to discovering exciting physics. We investigate how a current can control the ferromagnetic properties of such materials. Using ... -
Current driven spin–orbit torque oscillator: ferromagnetic and antiferromagnetic coupling
Johansen, Øyvind; Linder, Jacob (Peer reviewed; Journal article, 2016)We consider theoretically the impact of Rashba spin–orbit coupling on spin torque oscillators (STOs) in synthetic ferromagnets and antiferromagnets that have either a bulk multilayer or a thin film structure. The synthetic ... -
Direct and inverse superspin Hall effect in two-dimensional systems: Electrical detection of spin supercurrents
Risinggård, Vetle Kjær; Linder, Jacob (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 ... -
Dynamical tuning between nearly perfect reflection, absorption, and transmission of light via graphene/dielectric structures
Linder, Jacob; Halterman, Klaus (Journal article; Peer reviewed, 2016)Exerting well-defined control over the reflection (R), absorption (A), and transmission (T) of electromagnetic waves is a key objective in quantum optics. To this end, one often utilizes hybrid structures comprised of ... -
Effect of midgap states on the magnetic exchange interaction mediated by a d-wave superconductor
Ghanbari Birgani, Atousa; Erlandsen, Eirik; Linder, Jacob (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 ... -
Electric and magnetic signatures of boundary states in topological insulators and superconductors
Rex, Stefan (Doctoral theses at NTNU;2017:271, Doctoral thesis, 2017)This thesis is based on original research that was carried out in the field of topological phases in quantum condensed matter physics. The results have been published in five papers in Physical Review B, which form the ... -
Electric control of superconducting transition through a spin-orbit coupled interface
Ouassou, Jabir Ali; Di Bernardo, Angelo; Robinson, Jason W.A.; Linder, Jacob (Journal article; Peer reviewed, 2016)We demonstrate theoretically all-electric control of the superconducting transition temperature using a device comprised of a conventional superconductor, a ferromagnetic insulator, and semiconducting layers with intrinsic ... -
Electric field control of magnon-induced magnetization dynamics in multiferroics
Risinggård, Vetle Meland; Kulagina, Iryna; Linder, Jacob (Journal article; Peer reviewed, 2016)We consider theoretically the effect of an inhomogeneous magnetoelectric coupling on the magnon-induced dynamics of a ferromagnet. The magnon-mediated magnetoelectric torque affects both the homogeneous magnetization and ... -
Equations of motion and frequency dependence of magnon-induced domain wall motion
Risinggård, Vetle Kjær; Tveten, Erlend Grytli; Brataas, Arne; Linder, Jacob (Journal article; Peer reviewed, 2017)Spin waves can induce domain wall motion in ferromagnets. We derive the equations of motion for a transverse domain wall driven by spin waves. Our calculations show that the magnonic spin-transfer torque does not cause ... -
Exchange-only, nuclear spin-free qubits in semiconductor quantum dots
Cadellans, Arnau Sala (Doctoral theses at NTNU;2020:255, Doctoral thesis, 2020)There are many successful proposals for using electron spins in quantum dots as qubits. However, a semiconductor quantum dot-based qubit that is scalable, reliable and robust enough for actual quantum information applications ... -
Exotic Vortex Structures in Diffusive Superconducting Systems
Fyhn, Eirik Holm (Master thesis, 2019)Selv vanligvis ikke-superledende materialer kan oppføre seg superledende dersom de blir plassert inntil en superleder. Dette fenometet kalles the proximity effect på engelsk, og når to materialer plasseres inntil hverandre ... -
Field-free nucleation of antivortices and giant vortices in non-superconducting materials
Amundsen, Morten; Ouassou, Jabir Ali; Linder, Jacob (Journal article; Peer reviewed, 2018)are usually energetically unfavorable, but geometric symmetry constraints on a superconductor in a magnetic field are known to stabilize such objects. Here, we show via microscopic calculations that giant vortices can ... -
General boundary conditions for quasiclassical theory of superconductivity in the diffusive limit: Application to strongly spin-polarized systems
Eschrig, Matthias; Cottet, Audrey; Belzig, W; Linder, Jacob (Journal article; Peer reviewed, 2015)Boundary conditions in quasiclassical theory of superconductivity are of crucial importance for describing proximity effects in heterostructures between different materials. Although they have been derived for the ballistic ... -
General solution of 2D and 3D superconducting quasiclassical systems: Coalescing vortices and nanoisland geometries
Amundsen, Morten; Linder, Jacob (Journal article; Peer reviewed, 2016)An extension of quasiclassical Keldysh-Usadel theory to higher spatial dimensions than one is crucial in order to describe physical phenomena like charge/spin Hall effects and topological excitations like vortices and ... -
Giant Anisotropy in the Josephson Effect and Magnetization Dynamics in Spin-Orbit Coupled Antiferromagnetic Josephson Junctions
Falch, Vemund (Master thesis, 2021)Vi benytter en Hubbard-modell til å beskrive en to-dimensjonal antiferromagnetisk Josephson kobling med Rashba-type spinn-bane kobling, og bruker modellen til å studere Josephson-strømmen og den frie energien i koblingen. ... -
Giant triplet proximity effect in π-biased Josephson junctions with spin-orbit coupling
Jacobsen, Sol; Linder, Jacob (Journal article, 2015)In diffusive Josephson junctions the phase difference φ between the superconductors strongly influences the spectroscopic features of the layer separating them. The observation of a uniform minigap and its phase modulation ... -
Going beyond the Chandrasekhar-Clogston limit in a flatband superconductor
Ghanbari Birgani, Atousa; Erlandsen, Eirik; Sudbø, Asle; Linder, Jacob (Peer reviewed; Journal article, 2022)The Chandrasekhar-Clogston limit normally places stringent conditions on the magnitude of the magnetic field that can coexist with spin-singlet superconductivity, restricting the critical induced Zeeman shift to a fraction ... -
Graphene-based extremely wide-angle tunable metamaterial absorber
Linder, Jacob; Halterman, Klaus (Journal article; Peer reviewed, 2016)We investigate the absorption properties of graphene-based anisotropic metamaterial structures where the metamaterial layer possesses an electromagnetic response corresponding to a near-zero permittivity. We find that ... -
Green’s Function Approach to Quantum Phenomena in Heterostructures with Spin- Polarization and Coherence
Fyhn, Eirik Holm (Doctoral theses at NTNU;2023:238, Doctoral thesis, 2023)Kvantemekanikken som muliggjør fremtidens informasjonsteknologi Moderne datamaskiner produserer en mengde varme som er sammenlignbart med varmen fra panelovner. Denne varmeproduksjonen, sammen med utfordringer relatert ... -
Improved domain-wall dynamics and magnonic torques using topological insulators
Linder, Jacob (Journal article, 2014)We investigate the magnetization dynamics that arises when a thin-film ferromagnet is deposited on a topological insulator (TI), focusing in particular on domain-wall motion via current and the possibility of a spin-wave ...