Excitons and biexcitons in symmetric electron-hole bilayers
Strongly Correlated Electrons
2013-09-10 v1 Computational Physics
Abstract
Symmetric electron-hole bilayer systems have been studied at zero temperature using the diffusion quantum Monte Carlo method. A flexible trial wave function is used that can describe fluid, excitonic and biexcitonic phases. We calculate condensate fractions and pair correlation functions for a large number of densities rs and layer separations d. At small d we find a one-component fluid phase, an excitonic fluid phase, and a biexcitonic fluid phase, and the transitions among them appear to be continuous. At d = 0, excitons appear to survive down to about rs = 0.5 a.u., and biexcitons form at rs > 2.5 a.u.
Keywords
Cite
@article{arxiv.1309.2091,
title = {Excitons and biexcitons in symmetric electron-hole bilayers},
author = {Ryo Maezono and Pablo López Ríos and Tetsuo Ogawa and Richard J. Needs},
journal= {arXiv preprint arXiv:1309.2091},
year = {2013}
}
Comments
5 pages, 4 figures