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- W1653418061 abstract "We investigate the dynamics of correlated charge carriers in the vicinity of the Mott metal-to-insulator transition in various of the title quasi-two-dimensional organic charge-transfer salts by means of fluctuation (noise) spectroscopy. The observed $1/f$-type fluctuations are quantitatively very well described by a phenomenological model based on the concept of non-exponetial kinetics. The main result is a correlation-induced enhancement of the fluctuations accompanied by a substantial shift of spectral weight to low frequencies close to the Mott critical endpoint. This sudden slowing down of the electron dynamics may be a universal feature of metal-to-insulator transitons. For the less correlated metallic materials, we find a crossover/transition from hopping transport of more-or-less localized carriers at elevated temperatures to a low-temperature regime, where a metallic coupling of the layers allows for coherent interlayer transport of delocalized electrons." @default.
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- W1653418061 date "2011-05-17" @default.
- W1653418061 modified "2023-09-27" @default.
- W1653418061 title "Low-frequency charge-carrier dynamics in the vicinity of the Mott transition in quasi-two-dimensional organic superconductors $kappa$-(BEDT-TTF)${}_{2}$X" @default.
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