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Cyclotron resonance at fractional Landau-level fillings

Manger, M. F. ; Batke, E. ; Wegscheider, Werner
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Date of publication of this fulltext: 30 Nov 2009 14:09


Distinct shifts of the cyclotron resonance position correlating with various fractional Landau-level fillings were observed for high-mobility electron space-charge layers in GaAs. In the magnetic quantum limit the shifts are reversed for incompressible liquids in the filling factor regimes ν<0.5 and 0.5<ν<1. We propose an explanation based on a many-body induced renormalization of the electron effective mass.

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