Sökning: "electronic structure"

Visar resultat 31 - 35 av 1537 avhandlingar innehållade orden electronic structure.

  1. 31. Electronic Structure and Film Morphology Studies of PTCDI on Metal/Semiconductor Surfaces

    Författare :Christian Emanuelsson; Hanmin Zhang; Lars Johansson; Ellen Moons; Mats Ahmadi Götelid; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PTCDI; STM; LEED; XPS; UPS; NEXAFS; Organic Films; Semicondcutor Surfaces; Electronic Structure; Molecular Interactions; Film Morphology; Physics; Fysik;

    Sammanfattning : Organic semiconductors have received increasing attention over the last decades as potential alternatives for inorganic semiconductors. The properties of these films are highly dependent on their structural order. LÄS MER

  3. 32. Magnetism and Structure in Metallic Multilayers

    Författare :Erik Holmström; Turek Ilja; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Magnetism; Interfaces; Structure; KKR-ASA; CPA; Quantum Well; Fysik; Physics; Fysik;

    Sammanfattning : The interplay between magnetism and structure has been studied in magnetic multilayers by electronic structure calculations based on density functional theory and analyzed in terms of models. The main ideas behind the Korringa-Kohn-Rostocker Green’s function method are described and the implementation of the coherent potential approximation is outlined. LÄS MER

  4. 33. Lateral Superlattices in Commensurate Magnetic Fields: Electronic Structure, Transport and Optical Properties

    Författare :Egidijus Anisimovas; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tunneling; Physics; collective excitations; optical absorption; quantum Hall effect; electronic structure; two-dimensional electron systems; lateral superlattices; Electromagnetism; Fysik; optics; acoustics; Elektromagnetism; optik; akustik; Fysicumarkivet A:2001:Anisimovas;

    Sammanfattning : The present thesis is devoted to the theoretical study of two-dimensional electron systems moving in a modulated lateral periodic potential and a competing perpendicular magnetic field. The three introductory chapters offer a brief exposition of the basic issues in this area -- the description of the electron motion in a prependicular magnetic field, the group of magnetic translations and the commensurability phenomena -- at an elementary level. LÄS MER

  5. 34. A soft X-ray emission study of the electronic structure of molecules

    Författare :Kerstin Gunnelin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; molecules; electronic structure; soft x-ray emission spectroscopy; Fysik; Physics; Fysik; fysik; Physics;

    Sammanfattning : The electronic structure of molecules has been studied with soft x-ray emission (SXE)spectroscopy. The parity selection rule for electronic transitions using resonant excitation has been verified for homonuclear diatomic molecules by studying N2 and O2. LÄS MER

  7. 35. Structure and stability trends in the platinum metal-silicon systems

    Författare :Kenneth Göransson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Transition metal silicides; electronic band structure; monosilicides; FeSi structure type; MnP structure type; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : The stability of group 8-10 silicides has been studied by LMTO-ASA band structurecalculations. In the Rh-Si and Ir-Si systems the lowest calculated heat of formation isfound in compounds near the equiatomic composition. LÄS MER