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We measure a resonance in the frequency dependence of the real diagonal conductivity, Re[σ xx ], near integer filling factor, ν=3. This resonance depends strongly on ν, with peak frequency f pk ~1.7GHz at ν=3.04 or 2.92 close to integer ν, but f pk ~600MHz at ν=3.19 or 2.82, the extremes of where the resonance is visible. The dependence of f pk upon...
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