Browsing NTNU Open by Author "Linder, Jacob"
Now showing items 1-20 of 98
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Anisotropic Paramagnetic Meissner Effect by Spin-Orbit Coupling
Espedal, Camilla; Yokoyama, Takehito; Linder, Jacob (Journal article, 2016)Conventional s-wave superconductors repel an external magnetic field. However, a recent experiment [A. Di Bernardo et al., Phys. Rev. X 5, 041021 (2015)] has tailored the electromagnetic response of superconducting ... -
Anomalous domain wall velocity and Walker breakdown in hybrid systems with anisotropic exchange
Enoksen, Henrik; Sudbø, Asle; Linder, Jacob (Journal article; Peer reviewed, 2013)It has recently been proposed that spin-transfer torques in magnetic systems with anisotropic exchange can be strongly enhanced, reducing the characteristic current density with up to four orders of magnitude compared to ... -
Anomalous magnetic transport in ferromagnetic graphene junctions
Yokoyama, Takehito; Linder, Jacob (Journal article; Peer reviewed, 2011)We investigate magnetotransport in a ferromagnetic-normal-ferromagnetic graphene junction where a gate electrode is attached to the normal segment. It is shown that the charge conductance can be maximal at an antiparallel ... -
Asymmetric ferromagnetic resonance, universal Walker breakdown, and counterflow domain wall motion in the presence of multiple spin-orbit torques
Linder, Jacob; Alidoust, Mohammad (Journal article; Peer reviewed, 2013)Measurement of the maximum blood flow velocity is the primary means for determining the degree of carotid stenosis using ultrasound. The current standard for estimating the maximum velocity is Pulsed Wave (PW) Doppler with ... -
Chirality-sensitive domain wall motion in spin-orbit coupled ferromagnets
Linder, Jacob (Journal article; Peer reviewed, 2013)Using the Lagrangian formalism, we solve analytically the equations of motion for current-induced domain wall dynamics in a ferromagnet with Rashba spin-orbit coupling. An exact solution for the domain wall velocity is ... -
Controllable spin-transfer torque on an antiferromagnet in a dual spin-valve
Linder, Jacob (Journal article; Peer reviewed, 2011)We consider current-induced spin-transfer torque on an antiferromagnet (AFM) in a dual spin-valve setup. It is demonstrated that a net magnetization may be induced in the AFM by partially or completely aligning the sublattice ... -
Controllable Superconducting Phase Transition and Magnetization Reorientation due to Spin-Orbit Interactions
Johnsen, Lina Grøvan (Master thesis, 2019)Vi undersøker to superledende hybridstrukturer og ser på virkningen av å kombinere ulike materialer. Det første systemet består av en enkelt homogen ferromagnet koblet til en superleder, hvor et tynt lag av tungt normalmetall ... -
Controllable vortex loops in superconducting proximity systems
Fyhn, Eirik Holm; Linder, Jacob (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 ... -
Controlling spin supercurrents via nonequilibrium spin injection
Ouassou, Jabir Ali; Robinson, Jason W.A.; Linder, Jacob (Journal article; Peer reviewed, 2019)We propose a mechanism whereby spin supercurrents can be manipulated in superconductor/ferromagnet proximity systems via nonequilibrium spin injection. We find that if a spin supercurrent exists in equilibrium, a nonequilibrium ... -
Controlling superconducting spin flow with spin-flip immunity using a single homogeneous ferromagnet
Jacobsen, Sol; Kulagina, Iryna; Linder, Jacob (Journal article; Peer reviewed, 2016)Spin transport via electrons is typically plagued by Joule heating and short decay lengths due to spin-flip scattering. It is known that dissipationless spin currents can arise when using conventional superconducting ... -
Controlling supercurrents and their spatial distribution in ferromagnets
Lahabi, Kaveh; Amundsen, Morten; Ouassou, Jabir Ali; Beukers, Ewout; Pleijster, Menno; Linder, Jacob; Alkemade, Paul; Aarts, Jan (Journal article; Peer reviewed, 2017)Spin-triplet Cooper pairs induced in ferromagnets form the centrepiece of the emerging field of superconducting spintronics. Usually the focus is on the spin-polarization of the triplets, potentially enabling low-dissipation ... -
Controlling the superconducting transition by spin-orbit coupling
Banerjee, Niladri; Ouassou, Jabir Ali; Zhu, Yi; Stelmashenko, N. A.; Linder, Jacob; Blamire, Mark G. (Journal article; Peer reviewed, 2018)Whereas considerable evidence exists for the conversion of singlet Cooper pairs into triplet Cooper pairs in the presence of inhomogeneous magnetic fields, recent theoretical proposals have suggested an alternative way to ... -
Controlling the switching field in nanomagnets by means of domain-engineered antiferromagnets
Folven, Erik; Linder, Jacob; Gomonay, Helen V.; Scholl, Andreas; Doran, Andrew; Young, Anthony; Retterer, Scott; Malik, V.K.; Tybell, Per Thomas Martin; Takamura, Yayoi; Grepstad, Jostein (Journal article, 2015)Using soft x-ray spectromicroscopy, we investigate the magnetic domain structure in embedded nanomagnets defined in La0.7Sr0.3MnO3 thin films and LaFeO3/La0.7Sr0.3MnO3 bilayers. We find that shape-controlled antiferromagnetic ... -
Critical temperature and tunneling spectroscopy of superconductor-ferromagnet hybrids with intrinsic Rashba-Dresselhaus spin-orbit coupling
Jacobsen, Sol; Ouassou, Jabir Ali; Linder, Jacob (Journal article, 2015)We investigate theoretically how the proximity effect in superconductor/ferromagnet hybrid structures with intrinsic spin-orbit coupling manifests in two measurable quantities, namely the density of states and critical ... -
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 ... -
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 ...