Abstract
Fluctuation spectroscopy has been used as an investigative tool to understand the scattering mechanisms of carriers and their low-frequency dynamics in quasi-two-dimensional organic conductors κ ‐ ( BEDT ‐ TTF ) 2 X . We report on the very high noise level in these systems as determined from Hooge's empirical law to quantify 1 / f -type noise in solids. The value of the Hooge parameter γ H , i.e. the normalized noise level, of 10 5 – 10 7 is several orders of magnitude higher than values of γ H ∼ 10 − 2 – 10 − 3 typically found in homogeneous metals and semiconductors.
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