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Activated hopping transport in anisotropic systems at low temperatures
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-9863-2502
2016 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 94, no 19, p. 1-5, article id 195202Article in journal (Refereed) Published
Abstract [en]

Numerical calculations of anisotropic hopping transport based on the resistor network model are presented. Conductivity is shown to follow the stretched exponential dependence on temperature with exponents increasing from 1/4 to 1 as the wave functions become anisotropic and their localization length in the direction of charge transport decreases. For sufficiently strong anisotropy, this results in nearest- neighbor hopping at lowtemperatures due to the formation of a single conduction path, which adjusts in the planes where the wave functions overlap strongly. In the perpendicular direction, charge transport follows variable- range hopping, a behavior that agrees with experimental data on organic semiconductors.

Place, publisher, year, edition, pages
American Physical Society , 2016. Vol. 94, no 19, p. 1-5, article id 195202
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-132833DOI: 10.1103/PhysRevB.94.195202ISI: 000386895400001OAI: oai:DiVA.org:liu-132833DiVA, id: diva2:1052461
Note

Funding Agencies|Energimyndigheten; NSC (SNIC) [2015/4-20]

Available from: 2016-12-06 Created: 2016-11-30 Last updated: 2017-11-29Bibliographically approved

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Ihnatsenka, S.
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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  • de-DE
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