期刊
PHYSICAL REVIEW B
卷 93, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.041401
关键词
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资金
- ARO [W911NF-15-1-0088]
- AFOSR [FA9550-10-1-0022]
- NSF [DMR-1306878]
- SHINES, an Energy Frontier Research Center - U.S. Department of Energy (DOE), Office of Science, Basic Energy Science (BES) [DE-SC0012670]
- SHINES
- U.S. DOE, BES, Materials Sciences and Engineering Division [DE-SC0008145]
- EU [CNECT-ICT-604391]
- Humboldt fellowship
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1306878] Funding Source: National Science Foundation
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 exciton-electron 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 similar to 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.
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