Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/159981
Title: | Light-matter interactions in high quality manganese-doped two-dimensional molybdenum diselenide | Authors: | Liu, Sheng Wu, Yaze Liu, Xue Del Águila, Andrés Granados Xuan, Fengyuan Chaturvedi, Apoorva Zhang, Hua Quek, Su Ying Xiong, Qihua |
Keywords: | Science::Physics | Issue Date: | 2021 | Source: | Liu, 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. https://dx.doi.org/10.1007/s40843-020-1641-9 | Project: | MOE2018-T3-1-002 MOE2017-T2-1-040 RG 194/17 MOE2017-T2-2-139 |
Journal: | Science China Materials | Abstract: | Introducing 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. | URI: | https://hdl.handle.net/10356/159981 | ISSN: | 2199-4501 | DOI: | 10.1007/s40843-020-1641-9 | Schools: | School of Physical and Mathematical Sciences School of Materials Science and Engineering |
Rights: | © 2021 Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | MSE Journal Articles SPMS Journal Articles |
SCOPUSTM
Citations
50
3
Updated on Jun 3, 2023
Web of ScienceTM
Citations
50
3
Updated on Jun 7, 2023
Page view(s)
55
Updated on Jun 10, 2023
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.