Blar i NTNU Open på forfatter "Sudbø, Asle"

Phase structure and critical properties of an abelian gauge theory
Mo, Sjur (Dr. ingeniøravhandling, 0809103X; 2001:116, Doctoral thesis, 2002)Chapter 1 to 4 give a short introduction to superconductivity, microscopic theory, phase transitions, and MonteCarlo simulations. Chapter 2 is about Cooper pairing in different settings, but I also give a short introduction ... 
Phasecontrolled proximity effect in ferromagnetic Josephson junctions: Calculation of the density of states and the electronic specific heat
Alidoust, Mohammad; Rashedi, Gholamreza; Linder, Jacob; Sudbø, Asle (Journal article; Peer reviewed, 2010)We study the thermodynamic properties of a dirty ferromagnetic SFS Josephson junction with swave superconducting leads in the lowtemperature regime. We employ a full numerical solution with a set of realistic parameters ... 
Pressureinduced 0π transitions and supercurrent crossover in antiferromagnetic weak links
Enoksen, Henrik; Linder, Jacob; Sudbø, Asle (Journal article, 2013)We compute selfconsistently the Josephson current in a superconductorantiferromagnetsuperconductor junction using a lattice model, focusing on 0−π transitions occurring when the width of the antiferromagnetic region ... 
Probing phase separation in BoseFermi mixtures by the critical superfluid velocity
Linder, Jacob; Sudbø, Asle (Journal article; Peer reviewed, 2010)We investigate the effect exerted by spinpolarized fermions on the interaction between superfluid bosons for a BoseFermi mixture residing on an optical lattice, with particular emphasis on the possibility of an induced ... 
Pure spin current generated by reflection at a normal metal/twodimensional electron gas interface
Linder, Jacob; Yokoyama, Takehito; Sudbø, Asle (Journal article; Peer reviewed, 2010)The concept of a spin current is a useful tool in understanding spin transport in hybrid systems but its very definition is problematic in systems where spinorbit coupling effects are strong. In the absence of spindependent ... 
Quantum Monte Carlo Simulations of Drag Interaction in the Superfluid Phase of the 3Component BoseHubbard Model
Erlandsen, Eirik (Master thesis, 2018)We study AndreevBashkin drag interactions between the superflow of different components in the superfluid phase of a threecomponent BoseHubbard model without componentmixing interactions, relevant for cold atom systems ... 
Signature of oddfrequency pairing correlations induced by a magnetic interface
Linder, Jacob; Sudbø, Asle; Yokoyama, Takehito; Grein, Roland; Eschrig, Matthias (Journal article; Peer reviewed, 2010)We investigate the mutual proximity effect in a normal metal contacted to a superconductor through a magnetic interface. Analytical and selfconsistent numerical results are presented, and we consider both the diffusive ... 
Spinactive interfaces and unconventional pairing in halfmetal/superconductor junctions
Linder, Jacob; Cuoco, Mario; Sudbø, Asle (Journal article; Peer reviewed, 2010)We study the physical properties of a halfmetallic ferromagnet∣superconductor (HM∣S) bilayer, allowing for an arbitrary bulk pairing symmetry of the superconductor and spindependent processes at the interface. In particular, ... 
Spinflip scattering and critical currents in ballistic halfmetallic dwave Josephson junctions
Enoksen, Henrik; Linder, Jacob; Sudbø, Asle (Journal article, 2012)We analyze the dc Josephson effect in a ballistic superconductor/halfmetal/superconductor junction by means of the Bogoliubov–de Gennes equations. We study the role of spinactive interfaces and compare how different ... 
Spinorbit coupled multiband superconductors
Gunnarsen, Gudmund (Master thesis, 2016)A model for square lattice spin orbit coupled cooper pairing is derived using mean field theory. We look at three cases, a magnetic field parallel to the lattice, perpendicular to the lattice, and no magnetic field. For ... 
Spinpolarized Josephson current in superconductor/ferromagnet/superconductor junctions with inhomogeneous magnetization
Alidoust, Mohammad; Linder, Jacob; Rashedi, Gholamreza; Yokoyama, Takehito; Sudbø, Asle (Journal article; Peer reviewed, 2010)We study numerically the properties of spin transport and charge transport in a currentbiased nanoscale diffusive superconductor/ferromagnet/superconductor junction when the magnetization texture is nonuniform. Specifically, ... 
Spinsensitive longrange proximity effect in ferromagnet/spintripletsuperconductor bilayers
Annunziata, Gaetano; Cuoco, Mario; Noce, Canio; Sudbø, Asle; Linder, Jacob (Journal article; Peer reviewed, 2011)The discovery of noncentrosymmetric superconductors, such as CePt3Si, and chiral superconductors, such as Sr2RuO4, calls for experimental methods to identify the presence of spintriplet pairing. We here demonstrate a ... 
Superconductivity in Dirac Materials
Sjømark, Severin Bøyesen (Master thesis, 2016)In this Master s thesis we consider superconductivity in Bravais and bipartite lattice fermion models with nearest neighbour hopping and Rashbatype spinorbit coupling. The superconductivity is modelled from a negativeU ... 
Thermal remixing of phaseseparated states in twocomponent bosonic condensates
Galteland, Peder Notto; Babaev, Egor; Sudbø, Asle (Journal article; Peer reviewed, 2015)Weconsider a twocomponent interacting bosonic condensate with dominating intraspecies repulsive density–density interactions.Westudy the phase diagram of the system at finite temperature with rotation, using largescale ... 
Triplet proximity effect and oddfrequency pairing in graphene
Linder, Jacob; BlackSchaffer, Annica; Sudbø, Asle (Journal article; Peer reviewed, 2010)We study the interplay between proximityinduced superconductivity and ferromagnetism in graphene by selfconsistently solving the Bogoliubov de Gennes equations on the honeycomb lattice. We find that a strong triplet ... 
Triplet supercurrent due to spinactive zones in a Josephson junction
Linder, Jacob; Sudbø, Asle (Journal article; Peer reviewed, 2010)Motivated by a recent experiment evidencing triplet superconductivity in a ferromagnetic Josephson junction with a Cu2MnAlHeusler barrier, we construct a theoretical model accounting for this observation. The key ingredients ... 
TwoComponent SpinOrbit Coupled Ultracold Atoms in the Triangular Lattice  A Monte Carlo Study
Homleid Haugen, Håvard (Master thesis, 2018)Teknologiske fremskritt i ultrakalde atomeksperimenter har over de siste 20 årene økt interessen for fysisk intuitive Hamiltonfunksjoner som kan brukes til å undersøke fundamentale vekselvirkninger i sterkt korrelerte ... 
TwoComponent SpinOrbit Coupled Ultracold Atoms in the Weak and Strong Coupling Regimes
Thingstad, Even (Master thesis, 2017)Motivated by recent experimental advances, we study twocomponent spinorbit coupled ultracold bosonic atoms in two dimensions on a square optical lattice. Using a BoseHubbard model with spinconserving and nonspinconserving ... 
Unconventional Superconductivity on a Topological Insulator
Linder, Jacob; Tanaka, Yukio; Yokoyama, Takehito; Sudbø, Asle; Nagaosa, Naoto (Journal article; Peer reviewed, 2010)We study proximityinduced superconductivity on the surface of a topological insulator (TI), focusing on unconventional pairing. We find that the excitation spectrum becomes gapless for any spintriplet pairing, such that ... 
Vortex spin valve on a topological insulator
Amundsen, Morten; Hugdal, Henning Goa; Sudbø, Asle; Linder, Jacob (Journal article; Peer reviewed, 2018)Spinvalve structures are usually associated with the ability to modify the resistance of electrical currents. We here demonstrate a profoundly different effect of a spinvalve. In combination with a topological insulator ...