Search for dissertations about: "d-band"

Showing result 6 - 10 of 14 swedish dissertations containing the word d-band.

  1. 6. Toward first-principles understanding of carbonitride precipitation in steels

    Author : Dan Fors; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Steels; Coarsening; Interfaces; Peierls-Nabarro model; Diffusion; Precipitates; Density functional theory; Dislocation network; Misfit; Electronic structure;

    Abstract : The most important and widely used group of metallic alloys is steels, whichare alloys of the element iron together with carbon and usually other elementssuch as B, N, V, Nb and Cr. The strength in these alloys is closely connectedto the distribution of point defects, precipitates and grain boundaries whicheffectively act as obstacles for dislocation migration. READ MORE

  2. 7. Correlated Materials - Models & Methods

    Author : Hugo Strand; Göteborgs universitet.; Gothenburg University.; [2013]

    Abstract : This thesis encompass a series of studies on methods and models for electron systems with local interactions, relevant for correlated materials. The first study focus on the canonical model for local correlation, the Hubbard model. READ MORE

  3. 8. Computational Material Design Diluted Magnetic Semiconductors for Spintronics

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Lunmei Huang; Uppsala universitet.; [2007]
    Keywords : Physics; Density functional theory; Diluted magnetic semiconductor; Ferromagnetism; Defect; Phase transition; High pressure; Thermal elastic constant; Fysik;

    Abstract : The present thesis deals with the application of ab-initio electronic structure calculations based on density functional theory for material design.The correlation between magnetic properties and electronic structures has been investigated in detail for diluted magnetic semiconductors (DMS), which have promising application for spintronics devices. READ MORE

  4. 9. Ghost in the shell Studies on subsurface oxygen in oxide-derived copper nanocube catalysts

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Liu Chang; Stockholms universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical Physics; teoretisk fysik;

    Abstract : With the passage of time and the advancement of our industrial civilization, environmental concerns have become more and more recognized since the 1990s. Carbon dioxide reduction reactions are capable of converting carbon dioxide into valuable hydrocarbons and reducing the carbon emission from the combustion of fossil fuels. READ MORE

  5. 10. Characterization and Functionalization of 2D Overlayers Adsorbed on Transition Metals

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : May Ling Ng; Uppsala universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; h-BN; graphene; transition metals; nanomesh; functionalization; PES; NEXAFS; STM; LEED; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : Two-dimensional layered materials, namely monolayer hexagonal boron nitride and graphene were grown by CVD on various transition metals. The physical and chemical properties of these systems were characterized systematically using synchrotron-based spectroscopic techniques, scanning tunneling microscopy and low energy electron diffraction. READ MORE