Auflistung Fakultät für Mathematik und Physik nach Schlagwort "2DES"

Auflistung Fakultät für Mathematik und Physik nach Schlagwort "2DES"

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  • Coupling symmetry of quantum dot states 
    Rogge, M.C.; Harke, B.; Fricke, Christian; Hohls, Frank; Reinwald, M.; Wegscheider, W.; Haug, Rolf J. (College Park, MD : American Physical Society, 2005)
    With noninvasive methods, we investigate ground and excited states of a lateral quantum dot. Charge detection via a quantum point contact is used to map the dot dynamics in a regime where the current through the dot is too ...
  • Magnetization of modulation doped Si/SiGe quantum wells in high magnetic fields 
    Wilde, M.A.; Rhode, M.; Heyn, C.; Schäffler, F.; Zeitler, U.; Haug, Rolf J.; Heitmann, D.; Grundler, D. (College Park, MD : American Institute of Physics, 2005)
    We have fabricated highly sensitive micromechanical cantilever magnetometers and, by this means, investigated the de Haas-van Alphen effect of a two-dimensional electron system in a modulation-doped Si/SiGe heterostructure. ...
  • Measurement of the specific heat of a fractional quantum Hall system 
    Schulze-Wischeler, F.; Zeitler, U.; von Zobeltitz, Carsten; Hohls, Frank; Reuter, D.; Wieck, A.D.; Frahm, Holger; Haug, Rolf J. (College Park, MD : American Physical Society, 2007)
    Using a time-resolved phonon absorption technique, we have measured the relative specific heat of a two-dimensional electron system in the fractional quantum Hall effect regime. For filling factors ν=5/3, 4/3, 2/3, 3/5, ...
  • Observation of two modes of edge magnetoplasmons by selective edge channel detection 
    Sukhodub, G.; Hohls, Frank; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2005)
    We study the propagation of edge magnetoplasmons by time-resolved current measurements in the quantum Hall regime. Using selective detection of edge states we distinguish two modes of edge excitations propagating with ...
  • Relative specific heat at v = 1/2 measured in a phonon absorption experiment 
    Schulze-Wischeler, F.; Hohls, Frank; Zeitler, U.; Reuter, D.; Wieck, A.D.; Haug, Rolf J. (College Park, MD : American Institute of Physics, 2005)
    In general it is far from being straightforward to measure the specific heat of a single two-dimensional electron system directly, since it is strongly dominated by the contribution of the substrate. Using a time-resolved ...
  • Signatures of spin in the ν=1/3 fractional quantum Hall effect 
    Dethlefsen, Annelene F.; Mariani, E.; Tranitz, H.-P.; Wegscheider, W.; Haug, Rolf J. (College Park, MD : American Physical Society, 2006)
    The activation gap Δ of the fractional quantum Hall state at constant filling ν=1/3 is measured in a wide range of perpendicular magnetic field B. Despite the full spin polarization of the incompressible ground state, we ...

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