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dc.contributor.authorYurtsever, A.en_US
dc.contributor.authorMoldoveanu, V.en_US
dc.contributor.authorTanatar, Bilalen_US
dc.date.accessioned2016-02-08T10:30:34Z
dc.date.available2016-02-08T10:30:34Z
dc.date.issued2003en_US
dc.identifier.issn0038-1098
dc.identifier.urihttp://hdl.handle.net/11693/24520
dc.description.abstractRecent Coulomb drag experiments in low-density double-layer electron systems have the power of distinguishing various many-body formulations of the effective interactions. In this work we theoretically study the correlation effects on the drag resistivity in these systems within various models. The effective inter-layer interactions are best described by the generalization to the double-layer case of the Kukkonen-Overhauser approach which differs significantly from the self-consistent field approach of Singwi et al. [Phys. Rev. 176 (1968) 589]. Following the formulation of Vignale and Singwi [Phys. Rev. B 32 (1985) 2156] we derive an expression for the effective inter-layer interaction which embodies the many-body correlations through the local-field corrections. The drag resistivity is calculated within this approach together with the Hubbard approximation for the intra-layer local-field factor and a simple model for the inter-layer correlations. Comparison with the recent measurements of Kellogg et al. [Solid State Commun. 123 (2002) 515] yields very good agreement. Our results are also contrasted with the corresponding drag resistivities given by the Singwi et al. theory, the dynamic random-phase approximation and the Hubbard approximation. The significant differences found between these theories emphasize the strong sensitivity of the drag resistivity to the effective inter-layer interactions.en_US
dc.language.isoEnglishen_US
dc.source.titleSolid State Communicationsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/S0038-1098(03)00081-4en_US
dc.subjectA. Two-dimensional electron systemsen_US
dc.subjectD. Drag resistivityen_US
dc.subjectD. Effective Coulomb interactionsen_US
dc.subjectApproximation theoryen_US
dc.subjectCorrelation methodsen_US
dc.subjectElectric conductivityen_US
dc.subjectMathematical modelsen_US
dc.subjectSensitivity analysisen_US
dc.subjectInter-layer interactionsen_US
dc.subjectElectronsen_US
dc.titleMany-body effects in the Coulomb drag between low density electron layersen_US
dc.typeArticleen_US
dc.departmentDepartment of Physics
dc.citation.spage575en_US
dc.citation.epage579en_US
dc.citation.volumeNumber125en_US
dc.citation.issueNumber11-12en_US
dc.identifier.doi10.1016/S0038-1098(03)00081-4en_US
dc.publisherElsevier Scienceen_US
dc.contributor.bilkentauthorTanatar, Bilalen_US


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