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Meeting MS&T22: Materials Science & Technology
Symposium Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
Presentation Title Exciton Physics at the Atomic Scale
Author(s) Dan Gunlycke
On-Site Speaker (Planned) Dan Gunlycke
Abstract Scope Descriptions of excitons in pristine semiconducting crystals usually rely on the hydrogen model adopted for excitons. Owing to the weak screening in monolayer transition-metal dichalcogenides, however, the electron and hole separation in the strongest bound excitons is on the atomic scale, necessitating atomistic treatment. In this presentation, we present a minimalistic exciton model that accounts for the lattice and the spin-orbit and exchange interactions, thus making this model appropriate across the spectrum from Wannier to Frenkel excitons. Using this model, we show that the exciton lifetimes could be extended by transitioning the excitons into excitonic dark states. Longer exciton lifetimes could make these materials candidates for applications in energy management and quantum information processing. This work has been supported by the Office of Naval Research (ONR), directly and through the Naval Research Laboratory (NRL).

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Dopamine Assisted Phase Transformation and Electrochemical Charge Storage Properties of Vanadium Oxide/Carbon Composite Electrodes
Effect of Strain on the Thermoelectric Properties of Epitaxial La0.8Sr0.2CoO3 Thin Films
Eliminating Artifactural Indentation Size Effects in Nanoindentation of Hard Ceramics
Enhancing the Low-temperature Consolidation of Nanosilver Materials
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Ferroelectricity in Hf0.5Zr0.5O2 Films – Processing Options to Achieve Better Ferroelectric Performance
Fundamental Understanding of Defect Evolution in Two-dimensional Phosphorus Under Ion Irradiation
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H-11: The Synaptic Devices Based on Ferroelectric Hf0.7Zr0.3O2 Thin Film
H-6: Carbon Fiber-reinforced CMCs for Ultra-high Temperature Applications
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H-8: Fast Microwave-assisted Synthesis of Nanosctructured High Entropy Spinel
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Inquiry of SiOC Structural Evolution via Synchrotron X-ray and Reactive Force Field Simulation
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