Location of Repository

Rotons in a hybrid Bose-Fermi system

By Ivan A. Shelykh, Thomas Taylor and Alexey V. Kavokin

Abstract

We calculate the spectrum of elementary excitations in a two-dimensional exciton condensate in the vicinity of a two-dimensional electron gas. We show that attraction of excitons due to their scattering with free electrons may lead to formation of a roton minimum. The energy of this minimum may go below the ground state energy which manifests breaking of the superfluidity. The Berezinsky-Kosterlitz-Thouless phase transition temperature decreases due to the exciton-exciton attraction mediated by electron

Topics: QC
Year: 2010
OAI identifier: oai:eprints.soton.ac.uk:180557
Provided by: e-Prints Soton

Suggested articles

Preview


To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.