Browsing Institutt for fysikk by Title
Now showing items 1730-1749 of 2667
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Phase structure and critical properties of an abelian gauge theory
(Dr. ingeniøravhandling, 0809-103X; 2001:116, Doctoral thesis, 2002)Chapter 1 to 4 give a short introduction to superconductivity, microscopic theory, phase transitions, and Monte-Carlo simulations. Chapter 2 is about Cooper pairing in different settings, but I also give a short introduction ... -
Phase transitions and correlations in fracture processes where disorder and stress compete
(Peer reviewed; Journal article, 2020)We study the effect of the competition between disorder and stress enhancement in fracture processes using the local load sharing fiber bundle model, a model that hovers on the border between analytical tractability and ... -
Phase transitions in effective lattice models for strongly correlated systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:174, Doctoral thesis, 2006)In three research articles we have studied the critical properties of effective lattice models for strongly correlated electron systems by Monte Carlo simulations. A similar model is used in a fourth article for investigating ... -
Phase transitions in low dimensional systems via spontaneous symmetry breaking and topology
(Doctoral thesis at NTNU;2015:271, Doctoral thesis, 2015)In nature there exists a fundamental distinction among particles regarding their statistics. Let us consider an isolated systems of two particles: two bosons are allowed to stay in the same physical state while two fermions ... -
Phase transitions in quantum field theory
(Doctoral theses at NTNU;2017:70, Doctoral thesis, 2017)In this thesis we deal with aspects related to phase transitions in quantum field theories. We focus in aspects of thermal field theory: QCD at high temperature under the influence of strong magnetic fields and a novel ... -
Phase-controlled proximity effect in ferromagnetic Josephson junctions: Calculation of the density of states and the electronic specific heat
(Journal article; Peer reviewed, 2010)We study the thermodynamic properties of a dirty ferromagnetic S|F|S Josephson junction with s-wave superconducting leads in the low-temperature regime. We employ a full numerical solution with a set of realistic parameters ... -
Phase-controlled spin and charge currents in a superconductor-ferromagnet hybrid
(Peer reviewed; Journal article, 2020)We investigate spin-dependent quasiparticle and Cooper-pair transport through a central node interfaced with two superconductors and two ferromagnets. We demonstrate that voltage biasing of the ferromagnetic contacts induces ... -
Phase-Field Modelling of Precipitation Mechanisms in Al-Mg-Si Alloys
(Master thesis, 2022)Denne masteravhandlingen studerer utfellingsprosessen av β′′ utfellinger under kunstig eldning av aluminiumslegeringer i 6xxx-serien ved å benytte seg av fase-felt metoden. I løpet av de siste to tiårene har det blitt ... -
Phases and condensates in zero-temperature QCD at finite μI and μS
(Peer reviewed; Journal article, 2022)I discuss pion and kaon condensation and the the properties of the phases of QCD at finite isospin chemical potential μI and strangeness chemical potential μS at zero temperature using three-flavor chiral perturbation ... -
Phenomenology of current-induced skyrmion motion in antiferromagnets
(Journal article; Peer reviewed, 2016)We study current-driven skyrmion motion in uniaxial thin film antiferromagnets in the presence of the Dzyaloshinskii–Moriya interactions and in an external magnetic field. We phenomenologically include relaxation and ... -
phi-state and inverted Fraunhofer pattern in nonaligned Josephson junctions
(Journal article; Peer reviewed, 2013)A generic nonaligned Josephson junction in the presence of an external magnetic field is theoretically considered and an unusual flux-dependent current-phase relation (CPR) is revealed. We explain the origin of the anomalous ... -
Phonon Coupled Luttinger Liquids in a Haldane Armchair Nanoribbon
(Master thesis, 2021)Det har nylig blitt foreslått en metode for å indirekte detektere topologi i en spinnbølgemodell koblet til fononer. Motivert av dette undersøker jeg én-partikkel Green-funksjonen til topologisk beskyttet fermionske ... -
Phonon-Mediated Quasiparticle Lifetime Renormalizations in Few-Layer Hexagonal Boron Nitride
(Peer reviewed; Journal article, 2023)Understanding the collective behavior of the quasiparticles in solid-state systems underpins the field of non-volatile electronics, including the opportunity to control many-body effects for well-desired physical phenomena ... -
Phonon-mediated superconductivity in doped monolayer materials
(Peer reviewed; Journal article, 2020)Insight into why superconductivity in pristine and doped monolayer graphene seems strongly suppressed has been central for the recent years' various creative approaches to realize superconductivity in graphene and graphene-like ... -
Phosphate Coatings Enriched with Copper on Titanium Substrate Fabricated Via DC-PEO Process
(Peer reviewed; Journal article, 2020)The present paper covers the possible ways to fabricate advanced porous coatings that are enriched in copper on a titanium substrate through Direct Current Plasma Electrolytic Oxidation (DC-PEO) with voltage control, in ... -
Phosphorene quantum dot electronic properties and gas sensing
(Journal article; Peer reviewed, 2019)Density functional theory calculations are performed on phosphorene quantum dots having different shapes and edge terminations to investigate their structure stability, electronic properties, and gas sensing ability. All ... -
Photochemistry of a Nucleobase Relevant to the Formation of Malignant Melanoma - Using Spectroscopic Techniques to Study the UV-Induced Damage of Thymine on MoS2
(Master thesis, 2016)Paring of nucleobases in deoxyribonucleic acid and the subsequent transcription of genes is arguably two of the most important processes for life. When subject to ultra violet (UV) light, one of the nucleobases, thymine, ... -
Photodynamic Therapy with Novel Glycosylated Chlorin Complexes on Bladder Cancer Cells from Rat (AY-27) and Human (T-24)
(Master thesis, 2021)Formålet med dette masterprosjektet var å utforske fotodynamiske, fotofysiske og fotokjemiske egenskaper til noen nye glykosylerte kloriner. Dette prosjektet er en del av et pågående samarbeid mellom Institutt for fysikk, ... -
Photoemission spectroscopies and their application in solid state and material physics
(Doctoral thesis at NTNU;2016:97, Doctoral thesis, 2016)Understanding the electronic properties of solid state systems is of fundamental importance to all matter. In particular, understanding and tailoring the properties of bound electrons in materials is an indispensable step ... -
Photoluminescence of InAs/Ga(N)As quantum dot intermediate band solar cells
(Master thesis, 2014)In this thesis InAs/Ga(N)As quantum dot intermediate band solar cells (QDIBSCs) are studied using photoluminescence (PL) spectroscopy. The samples in this thesis have been complete QD-IBSCs with doping in the substrate, the ...