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The effects of pressure and magnetic field on the charge transport of heavily FeCl4 - doped polyacetylene

Title
The effects of pressure and magnetic field on the charge transport of heavily FeCl4 - doped polyacetylene
Authors
Aleshin A.N.Kim T.J.Suh D.S.Park Y.W.Kang H.Kang W.
Ewha Authors
강원
SCOPUS Author ID
강원scopus
Issue Date
2002
Journal Title
Thin Solid Films
ISSN
0040-6090JCR Link
Citation
vol. 417, no. 1-2, pp. 57 - 60
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The effects of hydrostatic pressure and magnetic field on the charge transport of oriented polyacetylene (PA) films heavily doped with FeCl4 - have been studied in the temperature range 0.37-300 K. It was found that application of pressure increases the room temperature conductivity and decreases the resistivity ratio ρr = ρ(0.37 K)/ρ(300 K) by ∼20-30%. At T < 2 K the temperature dependence of resistivity ρ(T) ∼ln T at ambient pressure and at 10 kbar. Transverse magnetoresistance (MR) at 10 kbar was found to be negative, linear and almost temperature independent at T < 2 K. The observed low temperature ρ(T) and MR behavior has attributed to weak localization which accompanied by the effect of saturation of electron dephasing by two-level systems of a special type. The stronger behavior of ρ(T) and MR at T > 2 K has associated with further suppression of weak localization due to more effective dephasing effect by low energy vibrational excitations. © 2002 Elsevier Science B.V. All rights reserved.
DOI
10.1016/S0040-6090(02)00578-3
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자연과학대학 > 물리학전공 > Journal papers
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