1992/05/01 by Antti-Pekka Jauho, Henrik Smith · 1 citation
Physics and Astronomy · #cond-mat
paper · pdf · doi:10.1103/physrevb.47.4420
12 pages
arxiv created 1992/05/01 · arxiv updated 2009/11/30
The Coulomb contribution to the temperature-dependent rate of momentum transfer, 1/τD, between two electron systems in parallel layers is determined by setting up two coupled Boltzmann equations, with the boundary condition that no current flows in the layer where an induced voltage is measured. The effective Coulomb interaction between the layers is determined selfconsistently, allowing for the finite thickness of the layers. As T→ 0, we find that 1/τDT2 approaches a constant value. At higher temperatures 1/τDT2 exhibits a maximum at T=T\rm max and then decreases as 1/T with increasing temperature. The value of T\rm max depends on the layer separation d according to T\rm max∝ d-α, where α≃ 0.8. The overall magnitude of the calculated 1/τD is approximately one half of the results of a recent experiment, suggesting that other mechanisms of momentum transfer may be important.