title: Exciton-Mott physics in a quasi-one-dimensional electron-hole system.
abstract: We investigate the correlation effect in the quasi-one-dimensional electron-hole (e-h) system under thermal equilibrium. A self-consistent screened T-matrix approximation developed here enables the description of an e-h pair under any ionization ratio, the portion of quasielectrons or quasiholes moving almost freely. Our phase diagram on the ionization ratio provides a unified description of exciton Mott physics from the low-density exciton gas towards the high-density electron-hole plasma, and predicts a first order transition at low temperature. The interband optical absorption-gain spectra are also evaluated, which succeeded in explaining semiquantitatively all aspects of the recent experimental observations in the strongly photoexcited quantum wires.
authors.affiliation: Department of Physics, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Yoshioka
authors.forename: Kenichi
authors.initials: K
authors.lastname: Asano