Drag effect in double-layer dipolar fermi gases

Date
2014
Advisor
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Source Title
Journal of Physics: Conference Series
Print ISSN
1742-6588
Electronic ISSN
Publisher
IOP
Volume
568
Issue
Pages
1 - 5
Language
English
Type
Conference Paper
Journal Title
Journal ISSN
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Abstract

We consider two parallel layers of two-dimensional spin-polarized dipolar Fermi gas without any tunneling between the layers. The effective interactions describing screening and correlation effects between the dipoles in a single layer (intra-layer) and across the layers (interlayer) are modeled within the Hubbard approximation. We calculate the rate of momentum transfer between the layers when the gas in one layer has a steady flow. The momentum transfer induces a steady flow in the second layer which is assumed initially at rest. This is the drag effect familiar from double-layer semiconductor and graphene structures. Our calculations show that the momentum relaxation time has temperature dependence similar to that in layers with charged particles which we think is related to the contributions from the collective modes of the system.

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Keywords
Charged particles, Drag, Electron gas, Low temperature effects, Momentum transfer, Steady flow, Temperature distribution, Collective modes, Correlation effect, Double layers, Effective interactions, Momentum relaxation, Single layer, Spin-polarized, Temperature dependence, Fermions
Citation
Published Version (Please cite this version)