University
of California, Davis
Physics
Department
Condensed
Matter Seminar
"Phenomena in cold exciton gases: Condensation,
macroscopic ordering and beyond"
Bound
electron-hole pairs - excitons - are Bose particles with small mass. Exciton
Bose-Einstein condensation is expected to occur at a few degrees Kelvin, the
temperature many orders of magnitude higher than for atoms. Experimentally, the
exciton temperature well below 1 Kelvin is achieved in coupled quantum well
semiconductor nanostructures. We overview the problem of exciton condensation
and report on new experiments, revealing bosonic stimulation of exciton
scattering. Novel experiments with pattern formation in exciton system and
macroscopically ordered exciton state will also be presented.
4:10 p.m., 416 PHY/GEO