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• W2078203178 abstract "The temperature dependences of the conductivity and magnetoconductivity of poly(3,4-ethylenedioxythiophene) doped with ${mathrm{PF}}_{6}$ (room-temperature conductivity of 200--300 S/cm) have been studied; $ensuremath{sigma}(T)$ is weakly temperature dependent with the characteristic resistivity ratio ${ensuremath{rho}}_{r}$=ensuremath{rho}(1.4 K)/ensuremath{rho}(291 K)=1.5--2.8. The sign of the temperature coefficient of resistivity (TCR) changes below 10 K from negative to positive for metallic samples with ${ensuremath{rho}}_{r}<2.1$; the temperature of the resistivity maximum, ${T}_{m}$, decreases with increasing ${ensuremath{rho}}_{r}.$ High magnetic fields induce the transition from positive to negative TCR for all samples with ${ensuremath{rho}}_{r}<2.1$ and decrease the low-temperature conductivity (negative magnetoconductance) for samples with ${ensuremath{rho}}_{r}>2.1$. The conductivity at low temperatures is well described by a ${T}^{1/2}$ dependence in both cases (negative and positive TCR) in a magnetic field and with the magnetic field equal to zero. The magnetoconductance is negative, isotropic, and exhibits an ${H}^{2}$ dependence at low magnetic fields and an ${H}^{1/2}$ dependence at high magnetic fields. These results are successfully explained as resulting from the influence of electron-electron interactions on the low-temperature conductivity." @default.
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• W2078203178 date "1997-08-15" @default.
• W2078203178 modified "2023-10-13" @default.
• W2078203178 title "Metallic conductivity at low temperatures in poly(3,4-ethylenedioxythiophene) doped with<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>PF</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>" @default.
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• W2078203178 doi "https://doi.org/10.1103/physrevb.56.3659" @default.
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