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Magnon-mediated superconductivity on the surface of a topological insulator
(Journal article; Peer reviewed, 2020)We study superconductivity on the surface of a topological insulator, mediated by magnetic fluctuations in an adjacent ferromagnetic or antiferromagnetic insulator. Superconductivity can arise from effective interactions ... -
Magnon-Mediated Superconductivity: Investigating the Emergence of Strong Topological Superconductivity Mediated by Magnons in a Coplanar, Non-Collinear Magnet
(Master thesis, 2023)Denne masteroppgaven undersøker hvorvidt topologisk superledning kan oppstå i et todimensjonalt system bestående av et normalmetall og en magnet med koplanær spinnfase. Vi bygger videre på arbeidet til Mæland og Sudbø [1], ... -
Magnon-polarons in cubic collinear antiferromagnets
(Peer reviewed; Journal article, 2019)We present a theoretical study of excitations formed by hybridization between magnons and phonons—magnon-polarons—in antiferromagnets. We first outline a general approach to determining which magnon and phonon modes can ... -
Magnus Expansion in Gauge Theories
(Master thesis, 2022)Noen uttrykk for løsningen på en ordinær differensiallikning utledes ved hjelp av en metode som innebærer Taylor-rekkeutvikling av vektorfeltet som definerer differensiallikningen. En generalisering av et kjent resultat ... -
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 ... -
Manipulating Spins in Antiferromagnets with External Forces
(Doctoral thesis at NTNU;2016:114, Doctoral thesis, 2016)This thesis presents five papers on theoretical spintronics. Four of the papers describe antiferromagnets and the interactions between the magnetic order parameter and external forces induced by charge currents, spin ... -
Manipulating superconductivity in magnetic nanostructures in and out of equilibrium
(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 ... -
Many-body effects on superconductivity mediated by double-magnon processes in altermagnets
(Journal article; Peer reviewed, 2024)Altermagnets exhibit a large electron spin splitting which can be understood as a result of strong coupling between itinerant electrons and localized spins. We consider superconductivity due to electron-magnon scattering, ... -
Mapping Orientation Distribution of Talc Particles in Polypropylene by Small-Angle X-ray Scattering Tomography
(Master thesis, 2013)Small-angle X-ray scattering tomography has for the first time been used toinvestigate the spatially resolved orientation distribution of talc particles in asample of injection molded isotactic polypropylene, where the ... -
Mapping the chemistry within, and the strain around, Al-alloy precipitates at atomic resolution by multi-frame scanning transmission electron microscopy
(Journal article; Peer reviewed, 2017)Al-Mg-Si(-Cu)alloys, used primarily in the transportation sector, are strengthened by nano-sized precipitate particles. There is a plethora of possible phases, depending onwhich elements are added to the alloy ... -
Markers of mitochondrial metabolism in tumor hypoxia, systemic inflammation, and adverse outcome of rectal cancer
(Journal article; Peer reviewed, 2019)Tumor hypoxia contributes to therapy resistance and metastatic progression of locally advanced rectal cancer (LARC). We postulated that the tumor mitochondrial metabolism, manifested by reactive oxygen species (ROS) and ... -
Masteroppgave - A Predictive Model for Biological Range Shift in Proton Therapy
(Master thesis, 2019)Protonterapi er en metode innenfor str˚alebehandling for kreft som har blitt tatt i bruk i mange land over hele verden i løpet av de siste ti˚arene. Et argument for ˚a bruke protonterapi er at protonene har en bedre ... -
Material properties of tapered crystalline silicon core fibers
(Journal article; Peer reviewed, 2017)Crystalline silicon optical fibers are emerging as a promising platform for a wide range of optoelectronic applications. Here we report a crystallographic study of the material properties within silicon fibers that have ... -
Material properties particularly suited to be measured with helium scattering: selected examples from 2D materials, van der Waals heterostructures, glassy materials, catalytic substrates, topological insulators and superconducting radio frequency materials
(Peer reviewed; Journal article, 2021)Helium Atom Scattering (HAS) and Helium Spin-Echo scattering (HeSE), together helium scattering, are well established, but non-commercial surface science techniques. They are characterised by the beam inertness and very ... -
Matlab Based Music Analyses of Piano Recordings: An Attempt to Connect Quantitative Acoustical Parameters to Subjective Performance Intention
(Master thesis, 2014)Timbre is a well known concept in music and denotes adjectives describing a sound or sound sensation. All instruments possess a characteristic timbre making it possible to distinguish one type of instrument from another. ... -
Matrix-Free Conjugate Gradient Methods for Finite Element Simulations on GPUs
(Master thesis, 2010)A block-structured approach for solving 2-dimensional finite element approximations of the Poisson equation on graphics processing units(GPUs) is developed. Linear triangular elements are used, and a matrix-free version ... -
Matter in extreme conditions: Resumming QCD thermodynamics
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:145, Doctoral thesis, 2011) -
Maximum Entropy and Maximum Entropy Production in Macroecology
(Master thesis, 2011)The Maximum Entropy Theory of Ecology (METE), developed by John Harte, presents an entirely new method of making inferences in ecology. The method is based on the established mathematical procedure of Maximum Information ...