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  • Title: Dispersion of the composite-fermion cyclotron-resonance mode.
    Author: Kukushkin IV, Smet JH, Schuh D, Wegscheider W, von Klitzing K.
    Journal: Phys Rev Lett; 2007 Feb 09; 98(6):066403. PubMed ID: 17358964.
    Abstract:
    The dispersion of the composite-fermion cyclotron-resonance mode is measured with an optical detection scheme under the combined excitation of microwave radiation and a surface acoustic wave from an interdigital transducer. The slowly traveling surface wave defines the transferred wave vector. Momenta up to 10;{8} m;{-1} are accessible. The cyclotron-resonance mode exhibits strong negative dispersion, which suggests predominant short range residual interaction among composite fermions. From an extrapolation, the cyclotron mass at k=0 is obtained and investigated as a function of electron density.
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