Sökning: "high-temperature phase transitions"
Visar resultat 1 - 5 av 25 avhandlingar innehållade orden high-temperature phase transitions.
1. Phase transitions in high-temperature superconductors
Sammanfattning : Thermal fluctuations and disorder strongly influence the behaviour of hightemperature superconductors. In particular the vortices play a key role in determining their properties. In this thesis the main focus lies on phase transitions, both in ultra-thin films and in three-dimensional systems, which are driven by vortex fluctuations. LÄS MER
2. Ordering and phase transitions in models of high temperature superconductors
Sammanfattning : .... LÄS MER
3. From Order to Disorder in High Temperature Superconductors
Sammanfattning : Phase transitions in a number of models related to hightemperature superconductors are investigated, using scalingmethods and Monte Carlo simulations. This thesis considers twomain topics. LÄS MER
4. Experimental Study of some Potassium and Sodium Bearing Aluminosilicates at High Temperatures and High Pressures
Sammanfattning : This dissertation presents the results of a high-temperature and high-pressure experimental study of some abundant aluminositicates, which are the main repositories for the two geochemically important elements, sodium and potassium, in the Earth's crust. Phase transitions of end member alkali feldspars and jadeite clinopyroxene are studied at high and ultrahigh pressures corresponding to the conditions between the transition zone and the deep Earth's lower mantle. LÄS MER
5. A Matter of Disorder : Monte Carlo Simulations of Phase Transitions in Strongly Disordered Systems
Sammanfattning : Phase transitions and their critical scaling properties, especially in systems with disorder, are important both for our theoretical understanding of our environment, but also for their practical use in applications and materials in our everyday life. This thesis presents results from finite size scaling analysis of critical phenomena in systems with disorder, using high-precision Monte Carlo simulations and state of the art numerical methods. LÄS MER