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- W1985756044 abstract "Measurements of spectral characteristics of electric noise in conducting Langmuir-Blodgett (LB) films of ${(mathrm{C}}_{16}{mathrm{H}}_{33}{ensuremath{-}mathrm{T}mathrm{C}mathrm{N}mathrm{Q})}_{0.4}{(mathrm{C}}_{17}{mathrm{H}}_{35}{ensuremath{-}mathrm{D}mathrm{M}mathrm{T}mathrm{T}mathrm{F})}_{0.6}$ prepared by the vertical lifting technique have been carried out. [${(mathrm{C}}_{16}{mathrm{H}}_{33}{ensuremath{-}mathrm{T}mathrm{C}mathrm{N}mathrm{Q})}_{0.4}{(mathrm{C}}_{17}{mathrm{H}}_{35}{ensuremath{-}mathrm{D}mathrm{M}mathrm{T}mathrm{T}mathrm{F})}_{0.6}$ denotes the surface-active charge-transfer complex of hexadecyltetracyanoquinodimethane $({mathrm{C}}_{16}{mathrm{H}}_{33}ensuremath{-}mathrm{T}mathrm{C}mathrm{N}mathrm{Q})$ and heptadecyldimethyltetrathiofulvalene $({mathrm{C}}_{17}{mathrm{H}}_{35}ensuremath{-}mathrm{D}mathrm{M}mathrm{T}mathrm{T}mathrm{F}).$] Excess $1/f$ noise has been observed over the frequency range of $1--{10}^{4}mathrm{Hz}.$ We found that the noise power is proportional to the square of dc current flowing through the sample and has a power spectrum varying approximately as ${f}^{ensuremath{-}1}$ over the frequency range studied. The noise power is three orders of magnitude larger than that predicted by Hooge's formula. A theoretical model for the origin of $1/f$ noise due to fluctuations of the number of charge propagation paths in the sample is proposed. The calculations of $1/f$ noise level using this model are in quantitative agreement with experimental results not only in the LB films but also in tetrathiofulvalene-tetracyanoquinodimethane (TTF-TCNQ) crystals." @default.
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- W1985756044 date "1998-05-15" @default.
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- W1985756044 title "1/fnoise in conducting Langmuir-Blodgett films" @default.
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- W1985756044 doi "https://doi.org/10.1103/physrevb.57.13220" @default.
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