Trion formation dynamics in monolayer transition metal dichalcogenides
Journal Article
·
· Physical Review B
- Univ. of Texas, Austin, TX (United States)
- Univ. of Washington, Seattle, WA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Technische Univ. Berlin, Berlin (Germany)
- Univ. of California, Riverside, CA (United States)
- Chalmers Univ. of Technology, Gothenburg (Sweden)
Here, 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 ~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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725; SC0008145; SC0012670
- OSTI ID:
- 1261338
- Alternate ID(s):
- OSTI ID: 1234138
OSTI ID: 1388928
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 4 Vol. 93; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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