Variational Bethe-Salpeter calculations predict that momentum-dark excitons and trions are the ground states in monolayer InSe, with phonon-assisted brightening producing PL spectra dominated by the negative trion at low temperatures.
Nanoscale 7(11), 4598–4810 (2015)
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Brightening dark excitons and trions in systems with a Mexican-hat energy dispersion: example of InSe
Variational Bethe-Salpeter calculations predict that momentum-dark excitons and trions are the ground states in monolayer InSe, with phonon-assisted brightening producing PL spectra dominated by the negative trion at low temperatures.