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Low-Temperature Breakdown of the Insulating Phase in Two-Dimensional Electron Systems

Baenninger, M; Ghosh, A; Pepper, M; Beere, HE; Farrer, I; Ritchie, DA; (2009) Low-Temperature Breakdown of the Insulating Phase in Two-Dimensional Electron Systems. In: Caldas, MJ and Studart, N, (eds.) PHYSICS OF SEMICONDUCTORS. (pp. 231 - 232). AMER INST PHYSICS

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Abstract

We present experimental evidence of a breakdown of localization at low temperatures in strongly interacting two-dimensional electrons systems with moderate background disorder. The observation is manifested by a transition from an activated transport behavior at high temperature to a metal-like (dp/dT>0) behavior at low temperature T less than or similar to 1 K. The results have been achieved in mesoscopic two-dimensional electron systems (2DES), where the disorder strength was systematically

Type:Proceedings paper
Title:Low-Temperature Breakdown of the Insulating Phase in Two-Dimensional Electron Systems
Event:29th International Conference on Physics of Semiconductors
Location:Rio de Janeiro, BRAZIL
Dates:2008-07-27 - 2008-08-01
ISBN-13:978-0-7354-0736-7
Keywords:Two-dimensional electron systems, metal-insulator transition, disorder, localization, electron-electron interactions
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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