Abstract:When transition-metal dichalcogenide monolayers lack inversion symmetry, their low-energy single particle spectrum near some high--symmetry points can, in some cases, be described by tilted massive Dirac Hamiltonians. The so-called Janus materials fall into that category. Inversion symmetry can also be broken by the application of out-of-plane electric fields, or by the mere presence of a substrate. Here we explore the properties of excitons in TMDC monolayers lacking inversion symmetry. We find that exc… Show more
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