Volume 36, Number 1, October 1996
|Page(s)||61 - 66|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Spectroscopy of local density of states fluctuations in a disordered conductor
Max-Planck-Institut für Festkörperforschung,
Heisenbergstr. 1, 70569 Stuttgart, Germany
2 Institut für Festkörperphysik, Universität Hannover, Appelstr. 2, 30167 Hannover, Germany
3 School of Physics and Chemistry, Lancaster University - LA1 4YB Lancaster, UK
4 Institut für Schicht- und Ionentechnik, Forschungszentrum Jülich GmbH Postfach 1913, 52428 Jülich, Germany
Accepted: 6 August 1996
The local density of states of a degenerate semiconductor is investigated at low magnetic fields by resonant tunneling through a discrete localized energy level. Mesoscopic fluctuations of the local density of states below the Fermi level are imaged as temperature-insensitive fine structure in the tunneling current. These fluctuations are attributed to quantum interference of diffusive electron waves in the three-dimensional disordered system.
PACS: 72.15.Rn – Quantum localization / 72.20.My – Galvanomagnetic and other magnetotransport effects / 73.40.Gk – Tunneling
© EDP Sciences, 1996
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