Blar i NTNU Open på forfatter "Ouassou, Jabir Ali"
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A combined fluid-dynamic and thermodynamic model to predict the onset of rapid phase transitions in LNG spills
Lervåg, Karl Yngve; Skarsvåg, Hans Langva; Aursand, Eskil; Ouassou, Jabir Ali; Hammer, Morten; Reigstad, Gunhild Allard; Ervik, Åsmund; Fyhn, Eirik Holm; Gjennestad, Magnus Aashammer; Aursand, Peder; Wilhelmsen, Øivind (Peer reviewed; Journal article, 2020)Transport of liquefied natural gas (LNG) by ship occurs globally on a massive scale. The large temperature difference between LNG and water means LNG will boil violently if spilled onto water. This may cause a physical ... -
Complete magnetic control over the superconducting thermoelectric effect
Ouassou, Jabir Ali; González-Ruano, César; Caso, Diego; Aliev, Farkhad G.; Linder, Jacob (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 ... -
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 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 ... -
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 ... -
Dc Josephson Effect in Altermagnets
Ouassou, Jabir Ali; Brataas, Arne; Linder, Jacob Wüsthoff (Journal article; Peer reviewed, 2023)The ability of magnetic materials to modify superconductors is an active research area for possible applications in thermoelectricity, quantum sensing, and spintronics. We consider the fundamental properties of the Josephson ... -
Density of States and Critical Temperature in Superconductor/Ferromagnet Structures with Spin-Orbit Coupling
Ouassou, Jabir Ali (Master thesis, 2015)We present both an analytical discussion of the weak proximity regime, and a full numerical investigation of the strong proximity regime. The results show that the spin-orbit coupling leaves a clear trace in the density ... -
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 ... -
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 ... -
Manipulating superconductivity in magnetic nanostructures in and out of equilibrium
Ouassou, Jabir Ali (Doctoral theses at NTNU;2019:57, Doctoral thesis, 2019)We consider nanostructures that are constructed from superconducting, ferromagnetic, and spin–orbit-coupled materials. These structures are analyzed both theoretically and numerically, under both equilibrium and nonequilibrium ... -
Microwave control of the superconducting proximity effect and minigap in magnetic and normal metals
Linder, Jacob; Amundsen, Morten; Ouassou, Jabir Ali (Journal article; Peer reviewed, 2016)We demonstrate theoretically that microwave radiation applied to superconducting proximity structures controls the minigap and other spectral features in the density of states of normal and magnetic metals, respectively. ... -
Observation of magnetic state dependent thermoelectricity in superconducting spin valves
Gonzalez-Ruano, C.; Caso, D.; Ouassou, Jabir Ali; Tiusan, C.; Lu, Y.; Linder, Jacob Wüsthoff; Aliev, Farkhad G. (Peer reviewed; Journal article, 2023)Superconductor-ferromagnet tunnel junctions demonstrate giant thermoelectric effects that are being exploited to engineer ultrasensitive terahertz radiation detectors. Here, we experimentally observe the recently predicted ... -
Paramagnetic Meissner Effect and Non-Equilibrium Vortices in Superconductor/Normal-Metal Structures
Falch, Håvard (Master thesis, 2023)Proksimitetseffekten mellom en superleder og et normalt metall fører til at noe av superledningen lekker inn i normalmetallet. Dette betyr at superledende virvler kan oppstå i normalmetallområdet. Vi studerer superleder- ... -
Prediction of a paramagnetic Meissner effect in voltage-biased superconductor/normal-metal bilayers
Ouassou, Jabir Ali; Belzig, Wolfgang; Linder, Jacob (Peer reviewed; Journal article, 2020)Conventional superconductors respond to external magnetic fields by generating diamagnetic screening currents. However, theoretical work has shown that one can engineer systems where the screening current is paramagnetic, ... -
Spectroscopic evidence of odd frequency superconducting order
Pal, Avradeep; Ouassou, Jabir Ali; Eschrig, Matthias; Linder, Jacob; Blamire, Mark G. (Journal article; Peer reviewed, 2017)Spin filter superconducting S/I/N tunnel junctions (NbN/GdN/TiN) show a robust and pronounced Zero Bias Conductance Peak (ZBCP) at low temperatures, the magnitude of which is several times the normal state conductance of ... -
Transient dynamics and quantum phase diagram for the square lattice Rashba-Hubbard model at arbitrary hole doping
Hodt, Erik Wegner; Ouassou, Jabir Ali; Linder, Jacob Wüsthoff (Peer reviewed; Journal article, 2023)Adding a Rashba term to the Hubbard Hamiltonian produces a model which can be used to learn how spin-orbit interactions impact correlated electrons on a lattice. Previous works have studied such a model using a variety of ... -
Triplet Cooper pairs induced in diffusive s-wave superconductors interfaced with strongly spin-polarized magnetic insulators or half-metallic ferromagnets
Ouassou, Jabir Ali; Pal, Avradeep; Blamire, Mark; Eschrig, Matthias; Linder, Jacob (Journal article; Peer reviewed, 2017)Interfacing superconductors with strongly spin-polarized magnetic materials opens the possibility to discover new spintronic devices in which spin-triplet Cooper pairs play a key role. Motivated by the recent derivation ... -
Voltage control of superconducting exchange interaction and anomalous Josephson effect
Ouassou, Jabir Ali; Linder, Jacob (Journal article; Peer reviewed, 2019)Exerting control over the magnetic exchange interaction in heterostructures is of both basic interest and has potential for use in spin-based applications relying on quantum effects. We show that the sign of the exchange ... -
Voltage-induced thin-film superconductivity in high magnetic fields
Ouassou, Jabir Ali; Vethaak, Tom Doekle; Linder, Jacob (Journal article; Peer reviewed, 2018)We predict that superconductivity in mesoscopic thin films can be stabilized in high magnetic fields if the superconductor is driven out of equilibrium by a DC voltage bias. For realistic material parameters and temperatures, ...