Exciton supersolidity in hybrid Bose-Fermi systems

Details Exciton supersolidity in hybrid Bose-Fermi systems Exciton supersolidity in hybrid Bose-Fermi systems

2011-08-07

arxiv.org/abs/1108.1560v4

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 4 figures, new version with updated bare exciton-exciton interaction

Scientific paper

We investigate the ground states of a Bose-Einstein condensate of indirect excitons coupled to an electron gas. We show that in a properly designed system, the crossing of a roton minimum into the negative energy domain can result in the appearance of the supersolid phase, characterized by periodicity in both real and reciprocal space. Accounting for the spin-dependent exchange interaction of excitons we obtain ferromagnetic supersolid domains. The Fourier spectra of excitations of weakly perturbed supersolids show pronounced diffraction maxima which may be detected experimentally.

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