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arXiv · 1505.07411

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

G. G. Spink·P. López Ríos·N. D. Drummond·R. J. Needs
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Abstract

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

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G. G. Spink, P. López Ríos, N. D. Drummond, R. J. Needs. 2016-08-10. Trion formation in a two-dimensional hole-doped electron gas. https://doi.org/10.1103/physrevb.94.041410

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