Exciton-Mott Physics in Two-Dimensional Electron-Hole Systems: Phase Diagram and Single-Particle Spectra

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 self-consistent 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.

11 pages, 6 figures

References in corpus (7)

• Macroscopically ordered state in exciton system
• Excitons and biexcitons in symmetric electron-hole bilayers
• Exciton Mott transition in Si Revealed by Terahertz Spectroscopy
• Ionization degree of the electron-hole plasma in semiconductor quantum wells
• Hysteresis in the Mott Transition between Plasma and Insulating Gas
• Instability toward biexciton crystallization in one-dimensional electron-hole systems
• Excitonic Mott transition in double quantum wells

Cited by in corpus (16)

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• Exciton-Driven Renormalization of Quasiparticle Band Structure in Monolayer MoS2
• Spin, charge and $\eta$-spin separation in one-dimensional photo-doped Mott insulators
• Quantum anomalous Hall effect and electric-field-induced topological phase transition in AB-stacked MoTe${}_2$/WSe${}_2$ moiré heterobilayers
• From carriers and virtual excitons to exciton populations: Insights into time-resolved ARPES spectra from an exactly solvable model
• Explaining Observed Stability of Excitons in Highly Excited CdSe Nanoplatelets
• Microscopic Theory of Equilibrium Polariton Condensates
• Controlled Interlayer Exciton Ionization in an Electrostatic Trap in Atomically Thin Heterostructures
• Electrical Breakdown of Excitonic Insulator
• Rate equation analysis on the dynamics of first-order exciton Mott transition
• Excitonic Complexes and Optical Gain in Two-Dimensional Molybdenum Ditelluride Well below Mott Transition
• Short note on the excitonic Mott phase
• Generalized Beth-Uhlenbeck Approach to the 2+1D Gross-Neveu Model