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Magnetoconductance anisotropy of a polymer thin film at the onset of metallicity

Zanettini, S. ; Dayen, J. F. ; Etrillard, C. ; Leclerc, N. ; Kamalakar, M. Venkata ; Doudin, B.

Applied physics letters, 2015-02, Vol.106 (6), p.Art. no. 063303 [Periódico revisado por pares]

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Título:
Magnetoconductance anisotropy of a polymer thin film at the onset of metallicity
Autor: Zanettini, S. ; Dayen, J. F. ; Etrillard, C. ; Leclerc, N. ; Kamalakar, M. Venkata ; Doudin, B.
Assuntos: Anisotropy ; Insulators ; Metallicity ; Polymeric films ; Polymers ; Thermal conductivity ; Thin films
É parte de: Applied physics letters, 2015-02, Vol.106 (6), p.Art. no. 063303
Descrição: Thin films of poly(2,5-bis(3-dodecyl-2-yl)-thieno[3,2-b]thiophene) (C12-PBTTT) polymer under electrolyte gating and doping are investigated as model systems for organic thin films devices approaching the metallic side of a metal-insulator (M-I) transition. For the most doped samples, with an estimated density reaching 8 × 1020 cm−3 holes and a conductivity exceeding 1000 S cm−1, a positive high-field magnetoconductance is found in a limited temperature range window and only when the field is perpendicular to the sample plane. This signature of weak localization, combined with indications of finite zero-temperature conductivity, allows us to identify delocalized metallic-like transport in these thin films, even though the conductivity decreases when cooling down the samples.
Editor: Melville: American Institute of Physics
Idioma: Inglês

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