Measurement of the Hall current density in a Corbino geometry 2D electron gas

S. A. J. Wiegers; J. G. S. Lok; M. Jeuken; U. Zeitler; J. C. Maan; M. Henini

doi:10.1103/PhysRevB.59.7323

Measurement of the Hall current density in a Corbino geometry 2D electron gas

S. A. J. Wiegers, J. G. S. Lok, M. Jeuken, U. Zeitler, J. C. Maan, and M. Henini

Phys. Rev. B 59, 7323 – Published 15 March 1999

Abstract

We have investigated the distribution of the Hall current in a Corbino geometry two-dimensional electron gas (2DEG) under quantum Hall effect conditions by measuring the induced magnetic moment. The magnetic moment near integer filling factor shows oscillations around the quantized value, which reflect a spatial redistribution of the Hall current density. The results show that at integer filling factor the local Hall conductivity in a high mobility sample is not quantized. Between integer filling factor the normal Hall current with the expected magnitude $V_{r} ν e^{2} / h$ is measured, showing the reliability of the technique.

Received 4 December 1998

DOI:https://doi.org/10.1103/PhysRevB.59.7323

Authors & Affiliations

S. A. J. Wiegers

High Field Magnet Laboratory and Research Institute for Materials, University of Nijmegen, Postbus 9010, NL-6500 GL Nijmegen, The Netherlands
Grenoble High Magnetic Field Laboratory, MPI-CNRS, Boîte Postale 166, F-38042 Grenoble Cedex 9, France

J. G. S. Lok and M. Jeuken

High Field Magnet Laboratory and Research Institute for Materials, University of Nijmegen, Postbus 9010, NL-6500 GL Nijmegen, The Netherlands

U. Zeitler

High Field Magnet Laboratory and Research Institute for Materials, University of Nijmegen, Postbus 9010, NL-6500 GL Nijmegen, The Netherlands
Institut für Festkörperphysik, Universität Hannover, Appelstrasse 2, D-30625 Hannover, Germany

J. C. Maan