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- W2004233935 abstract "We have measured the electrical resistivity (ρ) and thermoelectric power (TEP) of the perchlorate (ClO4−) doped stretch oriented polyacetylene (PA) film. For the highly conducting samples (σRT≈41 000 S/cm), the temperature dependence of the four-probe resistivity shows positive temperature coefficient of resistivity (TCR) from T = 1.5 to 300 K. For the less conducting samples, the four-probe resistivity data show the crossover of TCR with a broad minimum peak at T = T∗ ≈ 200 K. For samples of σRT ≥ 20 000 S/cm, ρ(1.5 K)ρ(300 K) < 1, i.e., the resistivity at 1.5 K is lower than the room temperature resistivity value. The temperature dependence of the TEP shows diffusive linear metallic TEP becoming temperature independent below 40 K. Unlike the others who used Cu(ClO4)2 for the ClO4− doping, the initial doping material we used is anhydrous Fe(ClO4)3 which is crucial to obtain positive TCR from T = 1.5 to 300 K." @default.
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- W2004233935 date "1998-07-01" @default.
- W2004233935 modified "2023-10-14" @default.
- W2004233935 title "Metallic temperature dependence of resistivity in perchlorate doped polyacetylene" @default.
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- W2004233935 doi "https://doi.org/10.1016/s0379-6779(98)00078-2" @default.
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