2015/07/31 by Akshay Singh, Galan Moody, Kha Tran +17 · 239 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Catalysis #Chemical physics #Chemistry #Condensed matter physics #Dynamics (music) #Graphene research and applications #Materials science #Monolayer #Nanotechnology #Organic chemistry #Perovskite Materials and Applications #Physics #Transition metal #Trion #cond-mat.mes-hall #cond-mat.mtrl-sci #msc:00A82
paper · pdf · doi:10.1103/physrevb.93.041401
published in Physical review. B./Physical review. B 93(4) (American Physical Society) · 6 pages, 4 figures; accepted to PRB rapid
arxiv created 2015/12/17 · openalex publication_date 2016/01/05 · arxiv updated 2016/01/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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 \ensuremath∼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.