Exciton formation and dissociation in mass-asymmetric electron-hole   plasmas
  First-principle path integral Monte Carlo simulations were performed in order to analyze correlation effects in complex electron-hole plasmas, particularly with regard to the appearance of excitonic bound states. Results are discussed in relation to exciton formation in unconventional semiconductors with large electron hole mass asymmetry. 
H. Fehske, V. Filinov, M. Bonitz, V. Fortov, and P. Levashov