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Magnetic-field-induced instabilities in localized two-dimensional electron systems

Baenninger, M and Ghosh, A and Pepper, M and Beere, HE and Farrer, I and Ritchie, DA (2008) Magnetic-field-induced instabilities in localized two-dimensional electron systems. In: Physical Review B: Condensed Matter and Materials Physics, 78 (16).

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We report density dependent instabilities in the localized regime of mesoscopic two-dimensional electron systems (2DESs) with intermediate strength of background disorder. They are manifested by strong resistance oscillations induced by high perpendicular magnetic fields B⊥ . While the amplitude of the oscillations is strongly enhanced with increasing B⊥ , their position in density remains unaffected. The observation is accompanied by an unusual behavior of the temperature dependence of resistance and activation energies. We suggest the interplay between a strongly interacting electron phase and the background disorder as a possible explanation.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Mr. Ramesh Chander
Date Deposited: 07 Sep 2009 08:53
Last Modified: 19 Sep 2010 04:57
URI: http://eprints.iisc.ac.in/id/eprint/17524

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