Untangling the Valley Structure of States for Intravalley Exchange Anisotropy in Lead Chalcogenides Quantum Dots
Year: 2024
Type: article
Abstract: We put forward a generalized procedure which allows to restore the bulk-like electron and hole wave functions localized in certain valleys from the wave functions of quantum confined electron/hole states obtained in atomistic calculations of nanostructures. The procedure is applied to the lead chalcogenide quantum dots to accurately extract the intravalley velocity matrix elements and the constants of the effective intravalley Hamiltonian of the exchange interaction for the ground exciton state in PbS and PbSe quantum dots. Our results suggest that intravalley parameters in PbS quantum dots are much more anisotropic than the ones in PbSe. Renormalization of the velocity matrix elements, forbidden band gap, valley and exchange splittings of exciton and exciton binding energy are also calculated.
Authors: I. D. Avdeev, M. O. Nestoklon
Institutions: Russian Academy of Sciences, Ioffe Institute
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funder: Russian Science Foundation
Award: G4690418340
OpenAlex ID: W4401530408