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Low-temperature collapse of electron localization in two dimensions

Baenninger, Matthias and Ghosh, Arindam and Pepper, Michael and Beere, Harvey E and Farrer, Ian and Ritchie, David A (2008) Low-temperature collapse of electron localization in two dimensions. In: Physical Review Letters, 100 (1). 016805-1-016805-4.

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We report direct experimental evidence that the insulating phase of a disordered, yet strongly interacting two-dimensional electron system becomes unstable at low temperatures. As the temperature decreases, a transition from insulating to metal-like transport behavior is observed, which persists even when the resistivity of the system greatly exceeds the quantum of resistivity $h/e^2$. The results have been achieved by measuring transport on a mesoscopic length scale while systematically varying the strength of disorder.

Item Type: Journal Article
Publication: Physical Review Letters
Publisher: The American Physical Society
Additional Information: This article copyright belongs to The American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 18 Feb 2008
Last Modified: 19 Sep 2010 04:42
URI: http://eprints.iisc.ac.in/id/eprint/13047

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