Journal
NANOSCALE
Volume 12, Issue 35, Pages 18153-18159Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr04243a
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Funding
- National Science Centre, Poland [2017/27/B/ST3/00205, 2017/27/N/ST3/01612, 2018/31/B/ST3/02111, 2016/23/G/ST3/04114]
- EU Graphene Flagship project [785219]
- ATOMOPTO project (TEAM programme of the Foundation for Polish Science - EU within the ERD-Fund)
- CNRS via IRP 2DM project
- Nano fab facility of the Institut Neel
- CNRS UGA
- LNCMI-CNRS, a member of the European Magnetic Field Laboratory (EMFL)
- Ministry of Education, Youth and Sports of the Czech Republic under the project CEITEC 2020 [LQ1601]
- Elemental Strategy Initiative by the MEXT, Japan [JPMXP0112101001]
- JSPS KAKENHI [JP20H00354]
- CREST, JST [JPMJCR15F3]
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Low temperature and polarization resolved magneto-photoluminescence experiments are used to investigate the properties of dark excitons and dark trions in a monolayer of WS(2)encapsulated in hexagonal BN (hBN). We find that this system is an n-type doped semiconductor and that dark trions dominate the emission spectrum. In line with previous studies on WSe2, we identify the Coulomb exchange interaction coupled neutral dark and grey excitons through their polarization properties, while an analogous effect is not observed for dark trions. Applying the magnetic field in both perpendicular and parallel configurations with respect to the monolayer plane, we determine theg-factor of dark trions to beg similar to -8.6. Their decay rate is close to 0.5 ns, more than 2 orders of magnitude longer than that of bright excitons.
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