2019/06/10 by Aurélien David, David, Aurelien, Nathan G. Young +3 · 1 citation
Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #GaN-based semiconductor devices and materials #Materials Science (cond-mat.mtrl-sci) #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices
paper · pdf · doi:10.48550/arxiv.1906.04315
openalex publication_date 2019/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The joint impact of Anderson localization and many-body interaction is\nobserved in the optical properties of strongly-disordered III-nitride quantum\nwells, a system where the Coulomb interaction and the fluctuating potential are\npronounced effects with similar magnitude. A numerical method is introduced to\nsolve the 6-dimensional coupled Schrodinger equation in the presence of\ndisorder and Coulomb interaction, a challenging numerical task. It accurately\nreproduces the measured absorption and luminescence dynamics of InGaN quantum\nwells at room-temperature: absorption spectra reveal the existence of a\nbroadened excitonic peak, and carrier lifetime measurements show that\nluminescence departs from a conventional bimolecular behavior. These results\nreveal that luminescence is governed by the interplay between localization and\nCoulomb interaction, and provide practical insight in the physics of modern\nlight-emitting diodes.\n