Magnetic Field Induced Instabilities in Localised Two-Dimensional Electron Systems

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We report density dependent instabilities in the localised regime of mesoscopic two-dimensional electron systems (2DES) with intermediate strength of background disorder. They are manifested by strong resistance oscillations induced by high perpendicular magnetic fields B_{\perp}. While the amplitude of the oscillations is strongly enhanced with increasing B_{\perp}, their position in density remains unaffected. The observation is accompanied by an unusual behaviour 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.
5 pages, 4 figures

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/172749

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0810.2418
 http://arxiv.org/abs/0810.2418
 Phys. Rev. B 78, 161306(R) (2008)
 doi:10.1103/PhysRevB.78.161306

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arXiv