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APS » Journals » Phys. Rev. Lett. » Volume 72 » Issue 10
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Phys. Rev. Lett. 72, 1522–1525 (1994)

Direct observation of resonant tunneling dynamics in high magnetic fields

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A. P. Heberle, M. Oestreich, S. Haacke, W. W. Rühle, J. C. Maan, and K. Köhler
Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70506 Stuttgart, Germany
Grenoble High Magnetic Field Laboratory Max-Planck-Institut Für Festkörperforschung–Centre Nationale de la Recherche Scientifique B. P. 166, F-38042 Grenoble Cedex 9, France
High Field Magnet Laboratory and Research Institute for Materials, University of Nijmegen, 6525 ED Nijmegen, The Netherlands
Fraunhofer-Institut für Angewandte Festkörperphysik, Tullastrasse 72, D-79108 Freiburg, Germany

Received 2 August 1993; published in the issue dated 7 March 1994

Magnetotunneling of electrons in an asymmetric double quantum well is investigated by time-resolved luminescence spectroscopy. The tunneling time decreases strongly when the bottom of the lowest electronic subband of the narrow well is brought to intersect the lowest wide well subband at nonzero wave vector by a magnetic field perpendicular to the growth direction. This decrease is particularly pronounced when longitudinal optical phonon emission is possible. Transfer becomes then as fast as in electrically tuned resonances in zero magnetic field.

© 1994 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.72.1522
DOI:
10.1103/PhysRevLett.72.1522
PACS:
73.40.Gk, 72.20.My, 78.47.+p
 
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