Spink, G. G. and Rios, P. Lopez and Drummond, N. D. and Needs, R. J. (2016) Trion formation in a two-dimensional hole-doped electron gas. Physical review B, 94 (4): 041410. ISSN 2469-9950
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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. 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.