Sökning: "substitutional effects"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden substitutional effects.

  1. 1. Studies of magnetoresistance and Y substitutions in YBa2Cu3O7-delta high temperature superconductors

    Författare :Magnus Andersson; Östen Rapp; Oystein Fischer; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; high-temperature superconductors; elctrical conductivity; magnetoresistance; measurement systems; YBa2Cu3O7; substitutional effects;

    Sammanfattning : .... LÄS MER

  3. 2. Doping effects on the structural and optical properties of GaN

    Författare :Sergey Khromov; Galia Pozina; Lars Hultman; Thierry Bretagnon; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Today there is a strong drive towards higher efficiency light emitters and devices for power electronics based on GaN and its ternary compounds. Device performance can be improved in several ways on the material level. LÄS MER

  4. 3. Theoretical Study of the Electronic Factor in Electron Transfer Reactions

    Författare :Manuel Braga; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The electronic factor D is calculated for a number of organic and biological electron transfer systems. Quantum chemical methods at different levels of accuracy are used: ab initio Hartree-Fock, broken-symmetry, and correlation-corrected methods such as multiconfigurational second-order perturbation theory, and also the semiempirical CNDO/S method for very large systems. LÄS MER

  5. 4. Theoretical Studies of Diamond for Electronic Applications

    Författare :Shuainan Zhao; Karin Larsson; Mats Boman; Gueorgui Gueorguiev; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Diamond; Surface functionalization; Electronic structure; graphene; dopant; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Sammanfattning : Diamond has since many years been applied in electronic fields due to its extraordinary properties. Substitutional dopants and surface functionalization have also been introduced in order to improve the electrochemical properties. LÄS MER

  7. 5. Theoretical investigation of Rare-Earth doped optical materials : Optimization and Prediction

    Författare :Amin Mirzai; Mekanik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Rare-earth (RE) doped optical materials are distinguished by their unique optical and electronic properties. These characteristics are essential for various applications, including laser stabilization, and phosphors. However, the sensitivity of these materials to environmental factors and intrinsic defects necessitates a deep understanding. LÄS MER