ArticleScientific reports2021
The influence of Coulomb interaction screening on the excitons in disordered two-dimensional insulators.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- 1D solitons in cubic-quintic fractional nonlinear Schrödinger model.Scientific reports · 2022Article
- Fractional quantum oscillator and disorder in the vibrational spectra.Scientific reports · 2022Article
- Stabilization of 1D solitons by fractional derivatives in systems with quintic nonlinearity.Scientific reports · 2022Article
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2 authors.
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Abstract
We study the joint effect of disorder and Coulomb interaction screening on the exciton spectra in two-dimensional (2D) structures. These can be van der Waals structures or heterostructures of organic (polymeric) semiconductors as well as inorganic substances like transition metal dichalcogenides. We consider 2D screened hydrogenic problem with Rytova-Keldysh interaction by means of so-called fractional Scrödinger equation. Our main finding is that above synergy between screening and disorder either destroys the exciton (strong screening) or promote the creation of a bound state, leading to its collapse in the extreme case. Our second finding is energy levels crossing, i.e. the degeneracy (with respect to index [Formula: see text]) of the exciton eigenenergies at certain discrete value of screening radius. Latter effects may also be related to the quantum manifestations of chaotic exciton behavior in above 2D semiconductor structures. Hence, they should be considered in device applications, where the interplay between dielectric screening and disorder is important.
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