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Trion Formation Dynamics in Monolayer Transition Metal Dichalcogenides
- Source :
- Phys. Rev. B 93, 041401 (2016)
- Publication Year :
- 2015
-
Abstract
- We report charged exciton (trion) formation dynamics in doped monolayer transition metal dichalcogenides (TMDs), specifically molybdenum diselenide (MoSe2), using resonant two-color pump-probe spectroscopy. When resonantly pumping the exciton transition, trions are generated on a picosecond timescale 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 ~ 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 TMDs. The quasiparticle formation and conversion processes are important for interpreting photoluminescence and photoconductivity in TMDs.<br />Comment: 6 pages, 4 figures; accepted to PRB rapid
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 93, 041401 (2016)
- Publication Type :
- Report
- Accession number :
- edsarx.1507.04463
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.93.041401