Campuses:

Coulomb drag

Monday, March 26, 2018 - 4:00pm - 5:00pm
Alex Levchenko (University of Wisconsin, Madison)
We will review the Boltzmann-Langevin transport theory in general and its description of the Coulomb drag effect in clean double-layer systems in particular. Coulomb drag arises from density fluctuations with spatial scales of order of interlayer separation. At low temperatures, their characteristic frequencies exceed the intralayer equilibration rate of the electron liquid, and Coulomb drag may be treated in the collisionless approximation. As temperature is raised, the electron mean free path becomes short due to electron-electron scattering.
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