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Low-temperature collapse of electron localization in two dimensions

Baenninger, M; Ghosh, A; Pepper, M; Beere, HE; Farrer, I; Ritchie, DA; (2008) Low-temperature collapse of electron localization in two dimensions. PHYS REV LETT , 100 (1) , Article 016805. 10.1103/PhysRevLett.100.016805. Green open access

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Abstract

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.

Type: Article
Title: Low-temperature collapse of electron localization in two dimensions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.100.016805
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.100.016805
Language: English
Additional information: © 2008 The American Physical Society
Keywords: METAL-INSULATOR-TRANSITION, QUANTUM HALL LIQUID, ANDERSON TRANSITION, GROUND-STATE, CONDUCTIVITY, DENSITY, GAS, SYSTEMS, LATTICE, FIELD
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1314472
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