Phonon-induced exciton weak localization in two-dimensional semiconductors
arXiv:2208.08501 · doi:10.1063/5.0122633
Abstract
We study theoretically the contribution of quantum effects to the exciton diffusion coefficient in atomically thin crystals. It is related to the weak localization caused by the interference of excitonic wavefunctions on the trajectories with closed loops. Due to a weak inelasticity of the exciton-phonon interaction the effect is present even if the excitons are scattered by long-wavelength acoustic phonons. We consider exciton interaction with longitudinal acoustic phonons with linear dispersion and with flexural phonons with quadratic dispersion. We identify the regimes where the weak localization effect can be particularly pronounced. We also briefly address the role of free charge carriers in the exciton quantum transport and, within the self-consistent theory of localization, the weak localization effects beyond the lowest order.
arXiv comment12 pages, 5 figures
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Cited by in corpus (5)
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- Electromagnetic field assisted exciton diffusion in moiré superlattices
- Coherent spin dynamics of excitons in strained monolayer semiconductors
- Elastic electron scattering and localization in a chain with isotopic disorder
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