Kavli Affiliate: David T. Limmer
| First 5 Authors: Yoonjae Park, David T. Limmer, , ,
| Summary:
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 to incorporate phonon-induced effects
without approximation. The effective mass and binding energies are compared
with perturbative and variational approaches, which provide qualitatively
consistent trends. We evaluate electron-hole recombination rates as mediated
through both trap-assisted and bimolecular processes, developing a consistent
statistical mechanical approach valid in the reaction limited regime. These
calculations demonstrate how phonons screen electron-hole interactions,
generically reducing exciton binding energies and increasing their radiative
lifetimes.
| Search Query: ArXiv Query: search_query=au:”David T. Limmer”&id_list=&start=0&max_results=10