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Trion formation in a two-dimensional hole-doped electron gas

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Article number041410
<mark>Journal publication date</mark>22/07/2016
<mark>Journal</mark>Physical review B
Issue number4
Volume94
Number of pages5
Publication StatusPublished
<mark>Original language</mark>English

Abstract

The interaction between a single hole and a two-dimensional, paramagnetic, homogeneous electron gas is studied using diffusion quantum Monte Carlo simulations. Electron-hole relaxation energies, pair-correlation functions, and electron-hole center-of-mass momentum densities are reported for a range of electron-hole mass ratios and electron densities. We find numerical evidence of a crossover from a collective excitonic state to a trion-dominated state in a density range in agreement with that found in recent experiments on quantum-well heterostructures.