Biexcitons in monolayer transition metal dichalcogenides tuned by magnetic fields
Christopher E Stevens1, Jagannath Paul1, Timothy Cox1
1Department of Physics, University of South Florida, 4202 East Fowler Ave., Tampa, FL, 33620, USA.
Abstract:
We present time-integrated four-wave mixing measurements on monolayer MoSe2 in magnetic fields up to 25 T. The experimental data together with time-dependent density function theory calculations provide interesting insights into the biexciton formation and dynamics. In the presence of magnetic fields the coherence at negative and positive time delays is dominated by intervalley biexcitons. We demonstrate that magnetic fields can serve as a control to enhance the biexciton formation and help search for more exotic states of matter, including the creation of multiple exciton complexes and excitonic condensates.
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