Browsing by Subject "calculation"

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  • Conductance fluctuations at the quantum Hall plateau transition 
    Hohls, Frank; Zeitler, U.; Haug, Rolf J. (College Park, MD : American Physical Society, 2002)
    We analyze the conductance fluctuations observed in the quantum Hall regime for a bulk two-dimensional electron system in a Corbino geometry. We find that characteristics like the power spectral density and the temperature ...
  • Electric field gradient calculations for LixTiS2 and comparison with 7Li NMR results 
    Bredow, Thomas; Heitjans, Paul; Wilkening, Martin (College Park, ML : American Institute of Physics Inc., 2004)
    The elements of the electric field gradient tensor at Li position in the intercalation compound LixTiS2 (with x=0.25, 0.33, 0.67, and 1.0) were calculated with first-principles methods and periodic supercell models. The ...
  • Fast dynamics of H2O in hydrous aluminosilicate glasses studied with quasielastic neutron scattering 
    Indris, Sylvio; Heitjans, Paul; Behrens, Harald; Zorn, Reiner; Frick, Bernhard (College Park, MD : American Physical Society, 2005)
    We studied the dynamics of dissolved water in aluminosilicate glasses with the compositions NaAlSi3O8⋅0.3H2O, NaAlSi3O8⋅1.3H2O and Ca0.5AlSi3O8⋅1.3H2O using quasielastic neutron scattering. As shown by near-infrared ...
  • Impurity effects in quantum dots: Toward quantitative modeling 
    Räsänen, E.; Könemann, J.; Haug, Rolf J.; Puska, M.J.; Nieminen, R.M. (College Park, MD : American Physical Society, 2004)
    We have studied the single-electron transport spectrum of a quantum dot in GaAs/AlGaAs resonant tunneling device. The measured spectrum has irregularities indicating a broken circular symmetry. We model the system with an ...
  • Magnetic-field-induced singularities in spin-dependent tunneling through InAs quantum dots 
    Hapke-Wurst, I.; Zeitler, U.; Frahm, Holger; Jansen, A.G.M.; Haug, Rolf J.; Pierz, Klaus (College Park, MD : American Physical Society, 2000)
    Current steps attributed to resonant tunneling through individual InAs quantum dots embedded in a GaAs-AlAs-GaAs tunneling device are investigated experimentally in magnetic fields up to 28 T. The steps evolve into strongly ...
  • Step and kink correlations on vicinal Ge(100) surfaces investigated by electron diffraction 
    Tegenkamp, Christoph; Wollschläger, Joachim; Pfnür, Herbert; Meyer zu Heringdorf, Frank-J.; Horn-von Hoegen, Michael (College Park, MD : American Physical Society, 2002)
    Using spot profile analysis in low-energy electron diffraction, we have investigated vicinal Ge(100) surfaces, which were miscut by 2.7° and 5.4°, respectively, in [011] direction with respect to the surface normal. Within ...
  • Die Untauglichkeit des üblichen Preises für die Anpassung der Vergütung 
    Ehlers, Michael (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2013)
    [no abstract]