Sökning: "wavefunctions"

Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet wavefunctions.

  1. 1. Theoretical study of electronic structure and optical properties of semiconductor nanostructures

    Författare :Martin Persson; Fasta tillståndets fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanowire superlattices; nanostructures; band structure; wavefunctions; III-V materials; optical properties; Halvledarfysik; Semiconductory physics; Fysicumarkivet A:2004:Persson; Tight-binding theory; nanocrystals; nanowires;

    Sammanfattning : In this thesis, the electronic structure and optical properties of semiconductor nanostructures are studied theoretically. Three types of nanostructures have been studied, silicon nanocrystals, free-standing III-V nanowires and free-standing GaAs/AlGaAs nanowire superlattices. LÄS MER

  3. 2. Electronic spectra and lifetimes with polarization propagators and geminal product wavefunctions : applications to Be, CH+ and Li2

    Författare :Erland Sangfelt; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  4. 3. Cluster model of disordered systems : application to doped semiconductors and a simple model polymer

    Författare :Rolf G. Riklund; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : In this thesis we study with an extended cluster model calculation the combined effect of disorder and electron-electron interaction on the electronic structure of doped semiconductors and a simple model polymer chain. First a one-band model using a Hartree calculation is compared to other authors result for the impurity band using less realistic Hamiltonians. LÄS MER

  5. 4. Spectroscopic studies of gaseous CuO

    Författare :Ove Appelblad; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This study aims at an understanding of the structure and dynamics of the diatomic molecule CuO. The excitation of the molecule has been accomplished by laser and traditional spectroscopic methods. Different kinds of light sources used to generate the spectrum of the molecule are described. LÄS MER

  7. 5. X-ray spectroscopy on diatomic and cationic molecules

    Författare :Ludvig Kjellsson; Jan-Erik Rubensson; Marcus Agåker; Monica Turcato; Michael Meyer; John Bozek; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray absorption spectroscopy; resonant inelastic X-ray scattering; cationic molecule; dinitrogen; dioxygen; carbon monoxide; aqueous hydroxyl radical; lifetime-vibrational interference; RIXS; XAS; LVI; N2; O2; CO; H2O; OH;

    Sammanfattning : X-ray spectroscopy have been used to study the electronic structure of diatomic and cationic molecules. X-ray absorption spectra of the molecular cations N2+, O2+, and CO+ have been measured. LÄS MER