Journal
2D MATERIALS
Volume 9, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/2053-1583/ac3b1c
Keywords
biexciton kinetics; TMDC; exciton; TRPL; light-cone
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Funding
- Elemental Strategy Initiative by the MEXT, Japan [JPMXP0112101001]
- JSPS KAKENHI [JP20H00354, JP19H05790]
- Science and Engineering Research Board (SERB)
- Indian Space Research Organization (ISRO)
- MHRD under STARS
- MHRD
- MeitY
- DST Nano Mission through NNetRA
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Monolayers of semiconducting transition metal dichalcogenides offer a promising platform for exploring many-body physics, and in this study, controlled kinetic manipulation of the charged biexciton was demonstrated through systematic dependence on excitation conditions.
The monolayers of semiconducting transition metal dichalcogenides host strongly bound excitonic complexes and are an excellent platform for exploring many-body physics. Here we demonstrate a controlled kinetic manipulation of the five-particle excitonic complex, the charged biexciton, through a systematic dependence of the biexciton peak on excitation power, gate voltage, and temperature using steady-state and time-resolved photoluminescence. With the help of a combination of the experimental data and a rate equation model, we argue that the binding energy of the charged biexciton is less than the spectral separation of its peak from the neutral exciton. We also note that while the momentum-direct radiative recombination of the neutral exciton is restricted within the light cone, such restriction is relaxed for a charged biexciton recombination due to the presence of near-parallel excited and final states in the momentum space.
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