Self-diffusion in a liquid complex plasma.
Self-diffusion has been experimentally studied in a two-dimensional underdamped liquid complex (dusty) plasma. It was found that the self-diffusion coefficient D increases linearly with the temperature T: D/omega(E)a2 = (0.019 +/- 0.007)(T/T(m) - 1), where T(m), omega(E), and a are the melting temperature, the Einstein frequency, and the mean particle separation, respectively. No superdiffusion was observed, whereas a subdiffusion occurred at temperatures close to melting.
Nunomura
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Max-Planck-Institut für Extraterrestrische Physik, D-85740 Garching, Germany.
Samsonov
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D
Zhdanov
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Morfill
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G