Sökning: "Roger Uhrberg"

Hittade 4 avhandlingar innehållade orden Roger Uhrberg.

  1. 1. Atomic and Electronic Structures of Clean and Metal Adsorbed Si and Ge Surfaces : An Experimental and Theoretical Study

    Författare :Johan Eriksson; Roger Uhrberg; Karsten Horn; Linköpings universitet; []

    Sammanfattning : In this work, a selection of unresolved topics regarding the electronic and atomic structures of Si and Ge surfaces, both clean ones and those modified by metal adsorbates, are addressed. The results presented have been obtained using theoretical calculations and experimental techniques such as photoelectron spectroscopy (PES), low energy electron diffraction (LEED) and scanning tunneling microscopy (STM). LÄS MER

  2. 2. Scanning Tunneling Microscopy and Photoelectron Spectroscopy Studies of Si(111) and Ge(111) Surfaces : Clean and Modified by H or Sn Atoms

    Författare :Ivy Razado-Colambo; Roger Uhrberg; Göran Hansson; Maria-Carmen Asensio; Linköpings universitet; []

    Sammanfattning : The (111) surfaces of Si and Ge were studied by scanning tunneling microscopy (STM) and photoelectron spectroscopy (PES) that are complementary techniques used to obtain structural and electronic properties of surfaces. The (111) surfaces have been of great interest because of the complex reconstructions formed by annealing. LÄS MER

  3. 3. Atomic and electronic structures of two-dimensional layers on noble metals

    Författare :Jalil Shah; Roger Uhrberg; Hafiz Muhammad Sohail; Patrick Vogt; Linköpings universitet; []

    Sammanfattning : Two-dimensional (2D) materials, in the form of a single atomic layer with a crystalline structure, are of interest for electronic applications. Such materials can be formed by a single element, e.g., by group IV or group V elements, or as a 2D surface alloy. LÄS MER

  4. 4. Experimental and Theoretical Studies of Metal Adsorbates Interacting with Elemental Semiconductor Surfaces

    Författare :Hafiz Muhammad Sohail; Roger Uhrberg; Leif Johansson; Kevin E. Smith; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Metal adsorbates on semiconductor surfaces have been widely studied over the last few decades. The main interest is focused on various one or two-dimensional structures that exhibit interesting electronic and atomic properties. This thesis focuses on metal adsorbates interacting with the Si(111) and Ge(111) surfaces. LÄS MER