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  • Trionpaper_v9

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Binding energies of trions and biexcitons in two-dimensional semiconductors from diffusion quantum Monte Carlo calculations

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Article number081301
<mark>Journal publication date</mark>15/02/2017
<mark>Journal</mark>Physical review B
Number of pages5
Publication StatusPublished
Early online date7/02/17
<mark>Original language</mark>English


Excitonic effects play a particularly important role in the optoelectronic behavior of two-dimensional (2D) semiconductors. To facilitate the interpretation of experimental photoabsorption and photoluminescence spectra we provide statistically exact diffusion quantum Monte Carlo binding-energy data for Mott-Wannier models of excitons, trions, and biexcitons in 2D semiconductors. We also provide contact pair densities to allow a description of contact (exchange) interactions between charge carriers using first-order perturbation theory. Our data indicate that the binding energy of a trion is generally larger than that of a biexciton in 2D semiconductors. We provide interpolation formulas giving the binding energy and contact density of 2D semiconductors as functions of the electron and hole effective masses and the in-plane polarizability.

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© 2017 American Physical Society