“School of Physics”
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| Paper IPM / P / 8521 |
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| Abstract: | |||||||
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Coulomb drag experiments in which the inter-layer resistivity is
measured are important as they provide information on the Coulomb
interactions in bilayer systems. When the layer densities are low
correlation effects become significant to account for the
quantitative description of experimental results. We investigate
systematically various models of effective inter-layer interactions
in a bilayer system and compare our results with recent experiments.
In the low density regime, the correlation effects are included via
the intra- and inter-layer local-field corrections. We employ
several theoretical approaches to construct static local-field
corrections. Our comparative study demonstrates the importance of
including the correlation effects accurately in the calculation of
drag resistivity. Recent experiments performed at low layer
densities are adequately described by effective inter-layer
interactions incorporating static correlations.
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