Browsing NTNU Open by Author "Krohg, Fredrik Nicolai"
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Effekter av manglende Lorentz-invarians på Nambu-Goldstone bosoner
Krohg, Fredrik Nicolai (Master thesis, 2015)I denne avhandlingen diskuterer vi symmetrier av feltteorier både med og uten Lorentz-invarians. Vi konstruerer en feltteori fri for interaksjoner som er invariant under den Euklidske gruppen E(2), har tilhørende Euler-Lagrange ... -
First-order superconducting phase transition in a chiral p+ip system
Haugen, Håvard Homleid; Krohg, Fredrik Nicolai; Babaev, Egor; Sudbø, Asle (Peer reviewed; Journal article, 2021)We use large-scale Monte Carlo computations to study the phase transitions between a two-component chiral p -wave superconductor and normal state in zero external magnetic field. We find a first-order phase transition from ... -
Studies of Ginzburg-Landau theories for two-component chiral superconductors
Krohg, Fredrik Nicolai (Doctoral theses at NTNU;2021:290, Doctoral thesis, 2021)In this thesis we examine theoretical models called Ginzburg-Landau models describing the phenomena of unconventional superconductivity at temperatures close to the transition temperature of superconductivity. Superconductors ... -
Thermal fluctuations and vortex lattice structures in chiral p-wave superconductors: Robustness of double-quanta vortices
Krohg, Fredrik Nicolai; Haugen, Håvard; Babaev, Egor; Garaud, Julien; Sudbø, Asle (Peer reviewed; Journal article, 2021)We use large-scale Monte-Carlo simulations to study thermal fluctuations in chiral p-wave superconductors in an applied magnetic field in three dimensions. We consider the thermal stability of previously predicted unusual ...