Stability of trions in coupled quantum wells modeled by two-dimensional bilayers

Witham, Oliver and Hunt, Ryan James and Drummond, Neil David (2018) Stability of trions in coupled quantum wells modeled by two-dimensional bilayers. Physical review B, 97 (5-8): 075424. ISSN 1098-0121

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Abstract

We report variational and diffusion quantum Monte Carlo calculations of the binding energies of isolated indirect trions and biexcitons in ideal two-dimensional bilayer systems within the effective-mass approximation, and with a Coulomb 1 / r interaction between charge carriers. The critical layer separation at which trions become unbound has been studied for various electron-hole mass ratios, and found to be over an order of magnitude larger than the critical layer separation for biexcitons.