Exciton-mott physics in two-dimensional electron-hole systems: Phase diagram and single-particle spectra

Kenichi Asano, Takuya Yoshioka

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Exciton Mott physics in two-dimensional electron-hole (e-h) systems is studied in the quasiequilibrium, which is the crossovers or phase transitions between the insulating exciton gas and the metallic e-h plasma. By developing a selfconsistent screened T-matrix approximation, we succeed in obtaining the "global" phase diagram on the plane of the e-h density and the temperature as a contour plot of the exciton ionization ratio. The detailed features of the exciton-Mott crossover at high temperature are figured out beyond the conventionally used concept of the Mott density. At low temperature, we find not only the region unstable toward the inhomogeneity but the pure Mott transition point characterized by the discontinuity in the ionization ratio. The single particle spectra also exhibit interesting features reflecting the excitonic correlations.

Original languageEnglish
Article number084702
Journaljournal of the physical society of japan
Volume83
Issue number8
DOIs
Publication statusPublished - 2014 Aug 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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