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Universality of ac conduction for generalized space-charge transport in ordered solids
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.ORCID-id: 0000-0002-7104-7127
Eindhoven University of Technology, Netherlands.
2005 (Engelska)Ingår i: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 72, nr 16, artikel-id 165110Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

On numerous nonmetallic systems, the ac conductivity is observed to follow an approximate power law behavior sigma(omega)=omega(s) with 0 amp;lt; s amp;lt;= 1. We show that the presence of nonlimiting, i.e., ohmic, contacts on the sample necessarily leads to these characteristics. The ac conductivity curves are obtained by the numerical solution of the complete set of time-dependent drift-diffusion equations. The calculated ac conductivity curves can be converted into quasiuniversal master curves by application of the Taylor-Isard scaling law for an arbitrary temperature dependence of the mobility. Our results demonstrate that space-charge transport can lead to the commonly observed power law and scaling behaviors without incorporating disorder. Nevertheless, the implications of disorder are discussed and they are expected to increase the range over which the power law behavior extends.

Ort, förlag, år, upplaga, sidor
American Physical Society , 2005. Vol. 72, nr 16, artikel-id 165110
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
URN: urn:nbn:se:liu:diva-141507DOI: 10.1103/PhysRevB.72.165110ISI: 000232934900037OAI: oai:DiVA.org:liu-141507DiVA, id: diva2:1145612
Tillgänglig från: 2017-09-29 Skapad: 2017-09-29 Senast uppdaterad: 2017-10-04

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Kemerink, Martijn
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Physical Review B. Condensed Matter and Materials Physics
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