Event Details

Part 1.
Screening by charged fermions ( electrons). Nanotubes, double quantum wells, multilayer superlattices. Matrix dielectric functions.

Part 2.
Screening by neutral bosons (spatially indirect dipolar excitons). It will be shown that screening of a Coulomb impurity center by bosons depends much stronger on the concentration than in the Fermi case. The screening changes drastically when the dipolar excitons form the Bose-Einstein condencate. This results from the Gross-Pitaevsky equation.