Metallic temperature dependence of resistivity in perchlorate doped polyacetylene

Content Provider	Semantic Scholar
Author	Park, Yung Woo Choi, E. S.
Copyright Year	1998
Abstract	Abstract We have measured the electrical resistivity (ρ) and thermoelectric power (TEP) of the perchlorate (ClO 4 − ) doped stretch oriented polyacetylene (PA) film. For the highly conducting samples ( σ RT ≈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 σ RT ≥ 20 000 S/cm, ρ(1.5 K ) ρ(300 K ) , 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(ClO 4 ) 2 for the ClO 4 − doping, the initial doping material we used is anhydrous Fe(ClO 4 ) 3 which is crucial to obtain positive TCR from T = 1.5 to 300 K.
Starting Page	81
Ending Page	86
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1016/S0379-6779(98)00078-2
Volume Number	96
Alternate Webpage(s)	https://arxiv.org/pdf/cond-mat/9809106v1.pdf
Alternate Webpage(s)	https://doi.org/10.1016/S0379-6779%2898%2900078-2
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article