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5 October 2023 Bidirectional phonon emission in 2D heterostructures triggered by ultrafast charge transfer
Aditya Sood
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Proceedings Volume PC12650, Physical Chemistry of Semiconductor Materials and Interfaces XXII; PC1265001 (2023) https://doi.org/10.1117/12.2678131
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
How do lattice vibrations mediate charge transfer across an interface? Answering this question requires experimental techniques that can visualize ultrafast lattice dynamics accompanying a charge-transfer event. I will discuss our recent work on type-II van der Waals heterostructures, which serve as excellent model systems for studying phonon-assisted electron transfer. Using femtosecond diffraction, we uncover a new mechanism for rapid energy sharing between monolayer semiconductors, involving charge transfer through a hybridized electronic state mediated by phonon emission in both layers[1]. Our work illuminates a novel route to control energy transport across atomic junctions. [1] Sood, Haber et al., Nat. Nanotechnol. (2023) https://doi.org/10.1038/s41565-022-01253-7
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Aditya Sood "Bidirectional phonon emission in 2D heterostructures triggered by ultrafast charge transfer", Proc. SPIE PC12650, Physical Chemistry of Semiconductor Materials and Interfaces XXII, PC1265001 (5 October 2023); https://doi.org/10.1117/12.2678131
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KEYWORDS
Heterojunctions
Phonons
Ultrafast phenomena
Femtosecond phenomena
Control systems
Diffraction
Human-machine interfaces
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