Search for dissertations about: "functional calculations"

Showing result 11 - 15 of 435 swedish dissertations containing the words functional calculations.

  1. 11. Quantum aspects of hydrogen in metals and oxides from density-functional calculations

    Author : Per G. Sundell; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; diffusion; density functional theory; hydrogen; quantum tunneling; electronic structure; perovskite oxide; metal; first-principles; DFT.; ab-initio;

    Abstract : Atomic hydrogen dissolved in a solid or adsorbed on a solid surfacedisplays many remarkable features, and is a subject ofgreat technological interest.An increased understanding of hydrogen/solid systems can supportthe development of areas as diverse asproton exchange membranes for fuel cells,heterogeneous catalysis, and growth of semiconductor devices. READ MORE

  2. 12. Alumina Thin Films : From Computer Calculations to Cutting Tools

    Author : Erik Wallin; Ulf Helmersson; Patrick Desjardins; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Alumina; thin films; coatings; sputtering; density functional theory; high power impulse magnetron sputtering; HIPIMS; Material physics with surface physics; Materialfysik med ytfysik; Surface engineering; Ytbehandlingsteknik; Surfaces and interfaces; Ytor och mellanytor;

    Abstract : The work presented in this thesis deals with experimental and theoretical studies related to alumina thin films. Alumina, Al2O3, is a polymorphic material utilized in a variety of applications, e.g., in the form of thin films. READ MORE

  3. 13. Density Functional Theory in Computational Materials Science

    Author : Jorge Mario Osorio Guillén; Rajeev Ahuja; Börje Johansson; Bruce N. Harmon; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Density Functional Theory; High Pressure; Phase Transitions; Elastic Properties; Lithium Batteries; Dilute Magnetic Semiconductors; Fysik; Physics; Fysik;

    Abstract : The present thesis is concerned to the application of first-principles self-consistent total-energy calculations within the density functional theory on different topics in materials science. Crystallographic phase-transitions under high-pressure has been study for TiO2, FeI2, Fe3O4, Ti, the heavy alkali metals Cs and Rb, and C3N4. READ MORE

  4. 14. Partial methane oxidation from electronic structure calculations

    Author : Adam Arvidsson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ZSM-5 zeolite; density functional theory; microkinetic modelling; Mo6S8 cluster; partial methane oxidation;

    Abstract : Investigating catalytic reactions with computational methods is a powerful approach to understand fundamental aspects of catalytic reactions and find ways to guide catalytic design. Partial methane oxidation is one example of a reaction with intriguing challenges, where a detailed atomistic approach may help to unravel the bottlenecks of this, as of yet, inefficient reaction. READ MORE

  5. 15. First principles calculations of perovskites structural properties

    Author : Blanka Magyari-Köpe; KTH; []
    Keywords : Density functional theory; Electronic structure; High pressure; Perovskite structure; Phase transition; Structural stability; Geophysics;

    Abstract : .... READ MORE