The Effect of the External Magnetic Field on the Wide Band Gap Polymer Conductivity

Autor: N. V. Vorob’eva, Yu. I. Latypova, A. N. Lachinov
Rok vydání: 2014
Předmět:
Zdroj: Journal of Superconductivity and Novel Magnetism. 28:757-759
ISSN: 1557-1947
1557-1939
DOI: 10.1007/s10948-014-2874-8
Popis: The polydiphenylenephtalide (PDP) films of submicron thickness can reversibly switch their conductivity from dielectric to quasi-metallic state with changing their boundary conditions. The intermediate conductivity state “semi-conducting” can also be obtained. The metallic conductivity is characterized by quasi-one-dimensional conductive channels with diameters of 10–100 nm. PDP molecule contains only C, H, and O atoms. The behavior of PDP films out-of-plane conductivity with in-plane magnetic field is studied with current-voltage characteristics (CVC) method. In dielectric state, the films have some volumetric conductivity, so the magnetic field suppresses the conductivity, as it must be because of the Hall effect. When the boundary conditions are changed to provide the “semi-conductive” state, some quasi-one-dimensional conducting channels are partially switching on. So the Hall effect is being suppressed in these sectors, and the previously trapped electrons become free just enlarging conductivity with the magnetic field enhancement. When the film is shifted to quasi-metallic state with linear CVC, the processes of enlarging the conductivity with the magnetic field enhancement become prevailing.
Databáze: OpenAIRE
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