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- W1566113976 abstract "An experimental study of the temperature and frequency dependence (in the audio and rf and microwave regions) of the conductivity of ${mathrm{H}}_{3}$${mathrm{PO}}_{4}$-doped polyaniline samples is presented. The dopant concentration of the samples varies between 0.09M and 3.60M. For all the samples studied, the temperature dependence of the dc conductivity is consistent with the expression for Mott's variable-range hopping. On the other hand, in the temperature range 88 ensuremath{le}Tensuremath{le}298 K and in the audio frequency range 20 Hz ensuremath{le}fensuremath{le}1 MHz, we remark that the ac conductivity (${mathrm{ensuremath{sigma}}}_{mathrm{ac}}$) does not vary much with frequency. From our wide-band measurement in the microwave region, however, we find that, for the 0.09M-doped sample, ${mathrm{ensuremath{sigma}}}_{mathrm{ac}}$ varies as ${mathrm{ensuremath{omega}}}^{mathit{s}}$ with sensuremath{simeq}0.6; using Mott's model for the hopping conduction in the ac regime, we find that this value of s yields a reasonable estimation for the hopping probability: ${ensuremath{nu}}_{mathit{p}mathit{h}}$ensuremath{sim}6.92ifmmodetimeselsetexttimesfi{}${10}^{13}$ ${mathrm{s}}^{mathrm{ensuremath{-}}1}$." @default.
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- W1566113976 title "Transport studies in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>H</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>PO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>-doped polyaniline" @default.
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- W1566113976 doi "https://doi.org/10.1103/physrevb.52.4801" @default.
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