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ac conductivity of a Coulomb glass from computer simulations
KTH, Superseded Departments, Physics. (Condensed Matter Theory)
KTH, Superseded Departments, Physics. (Condensed Matter Theory)ORCID iD: 0000-0002-2076-5911
2004 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 70, no 2, 024201- p.Article in journal (Refereed) Published
Abstract [en]

A method for calculating the photon-induced hopping ac conductivity of a Coulomb glass by computer simulation is proposed. Results obtained by using an effective relaxation algorithm for two three-dimensional models of a Coulomb glass are reported. ac conductance data clearly demonstrate the transition from super-linear to a sub-quadratic power law. We argue that the same qualitative behavior should be expected for compensated semiconductors. It is shown that the transition is driven by the Coulomb energy of sites forming resonant pairs and not by the width of the Coulomb gap.

Place, publisher, year, edition, pages
2004. Vol. 70, no 2, 024201- p.
Keyword [en]
metal-insulator-transition, disordered systems, gap
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-23615DOI: 10.1103/PhysRevB.70.024201ISI: 000222996600021Scopus ID: 2-s2.0-42749105673OAI: oai:DiVA.org:kth-23615DiVA: diva2:342314
Note
QC 20100525 QC 20111101Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Rosengren, Anders

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