1. Trion formation dynamics in monolayer transition metal dichalcogenides.
- Author
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Singh, Akshay, Moody, Galan, Tran, Kha, Scott, Marie E., Overbeck, Vincent, Berghäuser, Gunnar, Schaibley, John, Seifert, Edward J., Pleskot, Dennis, Gabor, Nathaniel M., Jiaqiang Yan, Mandrus, David G., Richter, Marten, Malic, Ermin, Xiaodong Xu, and Xiaoqin Li
- Subjects
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TRIONS (Nuclear physics) , *MONOMOLECULAR films , *PHASE transitions , *CHALCOGENIDES , *DOPING agents (Chemistry) , *ENERGY consumption - Abstract
We report charged exciton (trion) formation dynamics in doped monolayer transition metal dichalcogenides, specifically molybdenum diselenide (MoSe2), using resonant two-color pump-probe spectroscopy. When resonantly pumping the exciton transition, trions are generated on a picosecond time scale through excitonelectron interaction. As the pump energy is tuned from the high energy to low energy side of the inhomogeneously broadened exciton resonance, the trion formation time increases by ~50%. This feature can be explained by the existence of both localized and delocalized excitons in a disordered potential and suggests the existence of an exciton mobility edge in transition metal dichalcogenides. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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