• Corpus ID: 249017606

Renormalization of excitonic properties by polar phonons

@inproceedings{Park2022RenormalizationOE,
  title={Renormalization of excitonic properties by polar phonons},
  author={Yoo Kyung Park and David T. Limmer},
  year={2022}
}
We employ quasiparticle path integral molecular dynamics to study how the excitonic properties of model semiconductors are altered by electron-phonon coupling. We describe ways within a path integral representation of the system to evaluate the renormalized mass, binding energy, and radiative recombination rate of excitons in the presence of a fluctuating lattice. To illustrate this approach, we consider Fr¨ohlich-type electron-phonon interactions and employ an imaginary time influence functional… 

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SHOWING 1-10 OF 68 REFERENCES
Ab initiotheory of polarons: Formalism and applications
We develop a theoretical and computational framework to study polarons in semiconductors and insulators from first principles. Our approach provides the formation energy, excitation energy, and
Nonlocal Screening Dictates the Radiative Lifetimes of Excitations in Lead Halide Perovskites.
We use path integral molecular dynamics simulations and theory to elucidate the interactions between charge carriers, as mediated by a lead halide perovskite lattice. We find that the charge-lattice
The Motion of Slow Electrons in a Polar Crystal
A variational technique is developed to investigate the low-lying energy levels of a conduction electron in a polar crystal. Because of the strong interaction between the electron and the
Phonon Screening of Excitons in Semiconductors: Halide Perovskites and Beyond.
TLDR
It is demonstrated that the magnitude of the phonon screening correction in isotropic materials can be reliably predicted using four material specific parameters: the reduced effective mass, static and optical dielectric constants, and frequency of the most strongly coupled longitudinal-optical phonon mode.
Effective Hamiltonians and bindings energies of Wannier excitons in polar semiconductors
The interaction of Wannier excitons with an LO-phonon field is investigated in detail. We derive effective local Hamiltonians which may be used to calculate the whole exciton spectrum in a
Electron–Phonon Couplings Inherent in Polarons Drive Exciton Dynamics in Two-Dimensional Metal-Halide Perovskites
We report on the exciton formation and relaxation dynamics following photocarrier injection in a single-layer two-dimensional lead-iodide perovskite. We probe the time evolution of four distinct
Effective mass path integral simulations of quasiparticles in condensed phases.
TLDR
This work introduces an approach for studying quasiparticles in condensed phases by combining effective mass theory with the path integral treatment of quantum particles, and incorporates the generally anisotropic electronic band structure of materials into path integral simulation schemes to enable modeling of quasIParticles in quantum confinement.
Tuning the Fröhlich exciton-phonon scattering in monolayer MoS2
TLDR
Polarization-resolved Raman spectroscopy is used to gain insight to the exciton-phonon coupling in charge tunable single layer MoS2 devices by polarization resolved RamanSpectroscopy to demonstrate a promising strategy to increase the degree of valley polarization towards room temperature valleytronic applications.
Electron-hole excitations and optical spectra from first principles
We present a recently developed approach to calculate electron-hole excitations and the optical spectra of condensed matter from first principles. The key concept is to describe the excitations of
Calculating polaron mobility in halide perovskites
Lead halide perovskite semiconductors are soft, polar, materials. The strong driving force for polaron formation (the dielectric electron-phonon coupling) is balanced by the light band
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