Rashba exciton in a 2D perovskite quantum dot
Michael W. Swift, John L. Lyons, Alexander L. Efros, Peter C. Sercel
Abstract
, the exciton whose bulk dispersion reflects large spin-orbit Rashba terms in the conduction and valence bands and thus has minima at non-zero quasi-momenta. Placing Rashba excitonsin quasi-2D cylindrical quantum dots, we calculate size-dependent levels of confined excitons and their oscillator transition strengths. We consider the implications of this model for two-dimensional hybrid organic-inorganic perovskites, discuss generalizations of this model to 3D NCs, and establish criteria under which a bright ground exciton state could be realized.
Topics & Concepts
ExcitonQuantum dotBiexcitonCondensed matter physicsPerovskite (structure)Ground stateValence (chemistry)Rashba effectPhysicsDispersion relationRadiative transferMaterials scienceQuantum mechanicsChemistryFerromagnetismSpintronicsCrystallographyPerovskite Materials and ApplicationsQuantum Dots Synthesis And PropertiesSemiconductor Quantum Structures and Devices