TY - JOUR
T1 - Classical and wave-mechanical aspects of magneto-transport fluctuations in ballistic quantum dots
AU - Edwards, G.
AU - Grincwajg, Anna
AU - Ferry, D. K.
N1 - Funding Information:
Recent magneto-transport experiments have examined the conductance properties of meso-scopic quantum dots, with quantum point contact (QPC) 'ports', in both 'weak' and 'strong' magnetic field regimes \[1-4\].T he quantum dots are defined in a modulation-doped GaAs-A1GaAs heterostructure by the split-gate technique. Generally, very high mobility modulation-doped structures are used, so that the mean-free path is significantly * Corresponding author. 1 Work supported in part by the Office of Naval Research and by NEDO under the international joint research program 'Nanostructures and Electron Waves Project'. z supported by the Swedish Research Council for Engineering Sciences (TFR), the Swedish Institute (SI), and the Ericsson ISS'90 Foundation.
PY - 1996/9
Y1 - 1996/9
N2 - We examine the magneto-conductance fluctuations in quantum dot structures, for a weak field strength, using both the recursive Green's function technique and a classical simulation of ballistic motion employing semi-classical theory. We analyze the spectral content of the conductance fluctuations by both techniques, where the underlying classical dynamics are regular and chaotic, respectively, by constructing magnetic field conductance correlation functions and compare these with those obtained experimentally. We find that our numerical quantum mechanical correlation function results, for the chaotic dot, are in agreement with the predictions of semiclassical theory and consistent with experimental result.
AB - We examine the magneto-conductance fluctuations in quantum dot structures, for a weak field strength, using both the recursive Green's function technique and a classical simulation of ballistic motion employing semi-classical theory. We analyze the spectral content of the conductance fluctuations by both techniques, where the underlying classical dynamics are regular and chaotic, respectively, by constructing magnetic field conductance correlation functions and compare these with those obtained experimentally. We find that our numerical quantum mechanical correlation function results, for the chaotic dot, are in agreement with the predictions of semiclassical theory and consistent with experimental result.
KW - Computer simulations
KW - Electrical transports
KW - Green's function methods
KW - Quantum effects
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U2 - 10.1016/0921-4526(96)00384-5
DO - 10.1016/0921-4526(96)00384-5
M3 - Article
AN - SCOPUS:0030234117
VL - 227
SP - 144
EP - 147
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1-4
ER -