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

S. Zanettini ; J. F. Dayen ; C. Etrillard ; N. Leclerc ; Venkata Kamalakar Mutta (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; B. Doudin
Applied Physics Letters (0003-6951). Vol. 106 (2015), 6, p. Art. no. 063303.
[Artikel, refereegranskad vetenskaplig]

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 x 10(20) 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.

Denna post skapades 2015-03-30. Senast ändrad 2016-08-22.
CPL Pubid: 214539


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik


Teknisk fysik

Chalmers infrastruktur