Spink, GrahamLópez Ríos, PabloDrummond, Neil D.Needs, Richard J.2016-08-112016-08-112016-07-22Spink, G. G., López Ríos, P., Drummond, N. D., & Needs, R. J. (2016). Trion formation in a two-dimensional hole-doped electron gas. Physical Review B, 94(4), 041410(R). DOI: 10.1103/PhysRevB.94.0414102469-995010.1103/PhysRevB.94.041410http://hdl.handle.net/10034/618344The 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.enComputational PhysicsHomogeneous electron gasQuantum Monte CarloElectronic structureExcitonTrionArticle2469-9969Physical Review B