Low-Temperature Collapse of Electron Localisation in Two Dimensions

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We report direct experimental evidence that the insulating phase of a disordered, yet strongly interacting two-dimensional electron system (2DES) becomes unstable at low temperatures. As the temperature decreases, a transition from insulating to metal-like transport behaviour 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.
6 pages, 4 figures To appear in PRL

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Mesoscale and Nanoscale Physics, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/145822

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0711.1464
 http://arxiv.org/abs/0711.1464
 Phys. Rev. Lett. 100, 016805 (2008)
 doi:10.1103/PhysRevLett.100.016805

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arXiv