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HL: Fachverband Halbleiterphysik
HL 2: Electronic Structure Theory
HL 2.6: Vortrag
Montag, 14. März 2011, 11:30–11:45, POT 51
Holographic view on nanostructure wave functions — •Gabriel Bester1, Jie Peng1, Wen Lei2, Christian Notthoff2, Axel Lorke2, Dirk Reuter3, and Andreas Wieck3 — 1Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569 Stuttgart, Germany — 2Department of Physics and CeNIDE, University of Duisburg-Essen, Lotharstraße 1, 47048 Duisburg, Germany — 3Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany
In this contribution we demonstrate the possibility to influence the shape of the wave-functions in semiconductor quantum dots by the application of an external magnetic field Bz. The states of the so-called p-shell, which show distinct orientations along the crystal axes for Bz = 0 can be modified to become more and more circularly symmetric with increasing field. Their changing probability density can be monitored using magneto-tunneling wave function mapping. Calculations of the magneto-tunneling signals are in good agreement with the experimental data and explain the different tunneling maps of the p+ and p−-states as a consequence of the different sign of their respective phases.
W. Lei et al., Phys. Rev. Lett. 105, 176804 (2010).