Structures of quantum 2D electron-hole plasmas

TL;DR

This paper uses path integral Monte Carlo simulations to explore the complex phases and transitions of 2D quantum electron-hole plasmas across various temperatures, densities, and mass ratios.

Contribution

It provides a comprehensive analysis of phase transitions, including exciton formation, Mott transition, and crystallization, in 2D quantum e-h plasmas, which was not extensively studied before.

Findings

Identification of exciton and biexciton regions

Observation of Mott transition to metallic clusters

Detection of hexatic-like liquid and crystal-like lattice formations

Abstract

We investigate structures of 2D quantum electron-hole (e-h) plasmas by the direct path integral Monte Carlo method (PIMC) in a wide range of temperature, density and hole-to-electron mass ratio. Our simulation includes a region of appearance and decay of the bound states (excitons and biexcitons), the Mott transition from the neutral e-h plasma to metallic-like clusters, formation from clusters the hexatic-like liquid and formation of the crystal-like lattice.