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New Type of Electron Nuclear-Spin Interaction from Resistively Detected NMR in the Fractional Quantum Hall Effect Regime

Kronmüller, S. ; Dietsche, W. ; Klitzing, Klaus von ; Wegscheider, Werner ; Denninger, G. ; Bichler, Max
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Date of publication of this fulltext: 09 Nov 2009 13:31


Abstract

Two-dimensional electron gases in narrow GaAs quantum wells show huge longitudinal resistance (HLR) values at certain fractional filling factors. Applying an rf field with frequencies corresponding to the nuclear spin splittings of 69Ga, 71Ga, and 75As leads to a substantial decrease of the HLR establishing a novel type of resistively detected NMR. These resonances are split into four sublines ...

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