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dc.contributor.authorLiu, Shengen_US
dc.contributor.authorWu, Yazeen_US
dc.contributor.authorLiu, Xueen_US
dc.contributor.authorDel Águila, Andrés Granadosen_US
dc.contributor.authorXuan, Fengyuanen_US
dc.contributor.authorChaturvedi, Apoorvaen_US
dc.contributor.authorZhang, Huaen_US
dc.contributor.authorQuek, Su Yingen_US
dc.contributor.authorXiong, Qihuaen_US
dc.identifier.citationLiu, S., Wu, Y., Liu, X., Del Águila, A. G., Xuan, F., Chaturvedi, A., Zhang, H., Quek, S. Y. & Xiong, Q. (2021). Light-matter interactions in high quality manganese-doped two-dimensional molybdenum diselenide. Science China Materials, 64(10), 2507-2518.
dc.description.abstractIntroducing magnetic dopants into two-dimensional transition metal dichalcogenides has recently attracted considerable attention due to its promising applications in spintronics and valleytronics. Herein we realized manganese-doped molybdenum diselenide (MoSe2) single crystal via chemical vapor transport (CVT) reaction, containing up to 2.9% (atomic concentration) Mn dopants, and investigated the light-matter interaction in these samples. We observed a suppressed trion intensity, a longer photoluminescence lifetime, and prominent blue- and red-shift of E2g2 (in-plane) and A1g (out-of-plane) Raman modes, respectively. Moreover, the Mn dopants increase the valley Zeeman splitting of the MoSe2 monolayer by ∼50%, while preserving the linear dependence on magnetic field. First-principles calculations indicate that the spin-polarized deep level defect states are formed due to the Mn substitutional dopants in the MoSe2 lattice. The resulting defect potential favors the funnelling of excitons towards the defects. The Mn dopants reduce the magnitude of the interatomic force constants, explaining the red-shift of the A1g mode. The Mn atoms and their immediate Mo and Se neighbors carry significant magnetic moments, which enhance the observed exciton g-factors due to the exchange interactions affecting defect-bound excitons.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relationRG 194/17en_US
dc.relation.ispartofScience China Materialsen_US
dc.rights© 2021 Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved.en_US
dc.titleLight-matter interactions in high quality manganese-doped two-dimensional molybdenum diselenideen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.subject.keywordsFirst-Principles Calculationsen_US
dc.subject.keywordsExciton Funnellingen_US
dc.description.acknowledgementXiong Q acknowledges the support from Singapore Ministry of Education via AcRF Tier3 Programme “Geometrical Quantum Materials” (MOE2018-T3-1-002), AcRF Tier2 grant (MOE2017-T2-1-040) and Tier1 grant (RG 194/17). Quek SY acknowledges the funding from the National Research Foundation, Prime Ministers Office, Singapore, under its Medium-Sized Centre Programme. Xuan F acknowledges the funding from MOE2017-T2-2-139.en_US
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