Search for dissertations about: "phase transitions"

Showing result 1 - 5 of 184 swedish dissertations containing the words phase transitions.

  1. 1. Time-resolved X-ray diffraction studies of phonons and phase transitions

    University dissertation from Department of Physics, Lund University

    Author : Ola Synnergren; Lunds universitet.; Lund University.; Malmö University.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics; Phase transitions; X-ray diffraction; Phonons; Medicine; phonons; phase transitions;

    Abstract : Popular Abstract in Swedish Denna avhandling sammanfattar arbete där tidsupplöst röntgendiffraktion har använts för att undersöka kristallina material och studera dynamiken hos fononer och fasövergångar. Röntgendiffraktion är standardverktyget för stukturbestämning på en atomär skala. READ MORE

  2. 2. Phase transitions in novel superfluids and systems with correlated disorder

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Hannes Meier; KTH.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; condensed matter physics; phase transitions; critical phenomena; spin models; quantum phase transitions; quantum fluids; superfluidity; superconductivity; disordered systems; Bose glass; dirty bosons; vortex pinning; statistical mechanics; Monte Carlo simulation; Wolff algorithm; classical worm algorithm; Wang-Landau algorithm; Physics; Fysik;

    Abstract : Condensed matter systems undergoing phase transitions rarely allow exact solutions. The presence of disorder renders the situation  even worse but collective Monte Carlo methods and parallel algorithms allow numerical descriptions. READ MORE

  3. 3. Phase transitions in high-temperature superconductors

    University dissertation from Stockholm : KTH

    Author : Jack Lidmar; KTH.; [1998]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Superconductivity; Vortices; Phase transitions; Strongly correlated fermions; High-temperature superconductivity; Monte Carlo simulations.; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : 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. READ MORE

  4. 4. Computer Simulations of Simple Liquids with Tetrahedral Local Order the Supercooled Liquid, Solids and Phase Transitions

    University dissertation from Stockholm : Numerical Analysis and Computer Science (NADA) (together with KTH), Stockholm University

    Author : Måns Elenius; Stockholms universitet.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Simple liquids; glasses; liquid-glass transition; supercooled liquids; tetrahedral liquids; phase transitions; quasicrystals; molecular dynamics; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik; NATURAL SCIENCES Physics Condensed matter physics Liquid physics; NATURVETENSKAP Fysik Kondenserade materiens fysik Vätskefysik; Numerical Analysis; numerisk analys;

    Abstract : The understanding of complex condensed matter systems is an area of intense study. In this thesis, some properties of simple liquids with strong preference for tetrahedral local ordering are explored. These liquids are amenable to supercooling, and give complex crystalline structures on eventual crystallisation. READ MORE

  5. 5. Phase Transitions and Phase Formation of Hydrogen in Quasi-2D Lattices

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Stefan Olsson; Uppsala universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; hydrogen; finite-size effects; long-ranged interactions; superlattices; phase transitions; elastic interaction; Fysik; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : The role of the dimensionality and strain state of metallic lattices on the phase behavior of dissolved hydrogen was explored. Metallic superlattices with well defined hydrogen absorption potential on the nm scale, were utilized as test systems. READ MORE