Search for dissertations about: "first-principles theory"

Showing result 1 - 5 of 156 swedish dissertations containing the words first-principles theory.

  1. 1. Catalytic Water Production from First-Principles Calculations

    Author : Gustav Karlberg; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; platinum; Monte Carlo; first-principles; hydroxyl; transition metals; density functional theory DFT ; Metropolis; oxygen; water; water production reaction; hydrogen;

    Abstract : The main subject of this thesis is the catalytic water production reaction on metal surfaces. This reaction is of great current interest due to its importance in fuel cells, a clean and efficient way to convert chemical energy into electrical. READ MORE

  2. 2. Structural and magnetic disorder in crystalline materials a first principles study

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Davide Gambino; Björn Alling; Pavel Korzhavyi; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Disorder in crystalline materials can take different forms and originate from different sources. In particular, temperature introduces disorder in any kind of material. READ MORE

  3. 3. Effects of disorder in metallic systems from First-Principles calculations

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Christian Asker; Igor Abrikosov; Jörg Neugebauer; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Iron; Nickel; Magnesium; Manganese; Molybdenum; Zirconium; Elastic Constants; High pressure; Earth s core; Density-functional theory; Ab-initio; First-Principles; Core-level shifts; Molecular Dynamics; Phonons; Dynamical Instability; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik;

    Abstract : In this thesis, quantum-mechanical calculations within density-functional theory on metallic systems are presented. The overarching goal has been to investigate effects of disorder. In particular, one of the properties investigated is the bindingenergy shifts for core electrons in binary alloys using different theoretical methods. READ MORE

  4. 4. Amorphous and crystalline functional materials from first principles

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Leyla Isaeva; Olle Eriksson; Jörg Neugebauer; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; first-principles theory; lattice dynamics; phase transitions; amorphous materials; tribology; ultrafast magnetism;

    Abstract : This thesis deals with various functional materials from first-principles methods and is divided into two major parts according to the underlying atomic structure of the system under study. The first part of the thesis deals with the temperature-induced structural phase transitions in metallic  β'-AuZn and perovskite oxide LiOsO3. READ MORE

  5. 5. Materials Design from First Principles stability and magnetism of nanolaminates

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Martin Dahlqvist; Johanna Rosén; Nicola Spaldin; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In this thesis, first-principles calculations within density functional theory are presented, with a principal goal to investigate the phase stability of so called Mn+1AXn (MAX) phases. MAX phases are a group of nanolaminated materials comprised of a transition metal (M), a group 12-16 element (A), and carbon or nitrogen (X). READ MORE