Sökning: "scanning tunneling microscopy"
Visar resultat 1 - 5 av 51 avhandlingar innehållade orden scanning tunneling microscopy.
- Detta är en avhandling från Växjö : Linnaeus University Press
Sammanfattning : The main body of this thesis describes how to calculate scanning tunneling microscopy (STM) images from first-principles methods. The theory is based on localized orbital density functional theory (DFT), whose limitations for large-vacuum STM models are resolved by propagating localized-basis wave functions close to the surface into the vacuum region in real space. LÄS MER
- Detta är en avhandling från Division of Solid State Physics, Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
Sammanfattning : This thesis treats scanning tunneling luminescence (STL) investigations of semiconductor nanostructures. The STL technique combines scanning tunneling microscopy (STM) with detection of photons, induced by the tunneling electrons. The high spatial resolution in STM and the local excitation allow for optical investigations on the nanometer-scale. LÄS MER
3. Electronic and Geometrical Structure of Phthalocyanines on Surfaces An Electron Spectroscopy and Scanning Tunneling Microscopy StudyDetta är en avhandling från Uppsala : Acta Universitatis Upsaliensis
Sammanfattning : Core- and Valence Photoelectron Spectroscopy (PES), X-ray- and Ultraviolet-Visible Absorption Spectroscopy (XAS and UV-Vis), Scanning Tunneling Microscopy (STM) and Density Functional Theory (DFT) calculations are used to study the electronic and geometrical structure of a class of macro-cyclic molecules, Phthalocyanines (Pc), on surfaces. These molecules are widely studied due to their application in many different fields. LÄS MER
- Detta är en avhandling från Växjö : Linnaeus University
Sammanfattning : The work in this thesis is basically divided into two related but separate investigations.The first part treats simple chemical reactions of adsorbate molecules on metallic surfaces, induced by means of a scanning tunneling probe (STM). The investigation serves as a parameter free extension to existing theories. LÄS MER
- Detta är en avhandling från Stockholm : Fysik
Sammanfattning : This thesis is dedicated to analytical and numerical studiesof a few models of strongly correlated systems and thedevelopment of techniques for such studies. The common name"strongly correlated" refers to systems in which theinteractions (correlations) between the constituent particleslead to nontrivial properties, such as various types ofmagnetism, superconductivity, and exotic phases. LÄS MER