Magnetic Field Induced Instabilities in Localised Two-Dimensional Electron Systems

Details Magnetic Field Induced Instabilities in Localised Two-Dimensional Electron Systems Magnetic Field Induced Instabilities in Localised Two-Dimensional Electron Systems

2008-10-14

arxiv.org/abs/0810.2418v1

Phys. Rev. B 78, 161306(R) (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.78.161306

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.

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