Analytical Quantitative Semi-Classical Approach to the LoSurdo-Stark Effect and Ionization in 2D excitons
arXiv:2004.11646 · doi:10.1103/PhysRevB.102.035402
Abstract
Using a semi-classical approach, we derive a fully analytical expression for the ionization rate of excitons in two-dimensional materials due to an external static electric field, which eliminates the need for complicated numerical calculations. Our formula shows quantitative agreement with more sophisticated numerical methods based on the exterior complex scaling approach, which solves a non-hermitian eigenvalue problem yielding complex energy eigenvalues, where the imaginary part describes the ionization rate. Results for excitons in hexagonal boron nitride and the exciton in transition metal dichalcogenides are given as a simple examples. The extension of the theory to include spin-orbit-split excitons in transition metal dichalcogenides is trivial.
arXiv comment10 pages
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Cited by in corpus (4)
- Anisotropic Stark shift, field-induced dissociation, and electroabsorption of excitons in phosphorene
- Thermal effect on magnetoexciton energy spectra in monolayer transition metal dichalcogenides
- Efficient ionization of two dimensional excitons by intense single cycle terahertz pulses
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