The photoluminescence (PL) spectra of monolayer (1L) semiconductors feature peaks ascribed to different charge-carrier complexes. We perform diffusion quantum Monte Carlo simulations of the binding energies of these complexes and examine their response to electric and magnetic fields. We focus on quintons (charged biexcitons), since they are the largest free charge-carrier complexes in transition-metal dichalcogenides (TMDs). We examine the accuracy of the Rytova-Keldysh interaction potential between charges by comparing the binding energies of charge-carrier complexes in 1L-TMDs with results obtained using ab initio interaction potentials. Magnetic fields<8T change the binding energies (BEs) by∼0.2 meV,T−1, in agreement with experiments, with the BE variations of different complexes being very similar. Our results will help identify charge complexes in the PL spectra of 1L-semiconductors
@article{arxiv.2209.01593,
title = {Charge-carrier complexes in monolayer semiconductors},
author = {E. Mostaani and R. J. Hunt and D. M. Thomas and M. Szyniszewski and A. R. P. Montblanch and M. Barbone and M. Atature and N. D. Drummond and A. C. Ferrari},
journal= {arXiv preprint arXiv:2209.01593},
year = {2025}
}