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Valley Splitting and Polarization by the Zeeman Effect in MonolayerMoSe2
Open accessAbstract
We have measured circularly polarized photoluminescence in monolayer MoSe2 under perpendicular magnetic fields up to 10 T. At low doping densities, the neutral and charged excitons shift linearly with field strength at a rate of ∓0.12 meV/T for emission arising, respectively, from the K and K' valleys. The opposite sign for emission from different valleys demonstrates lifting of the valley degeneracy. The magnitude of the Zeeman shift agrees with predicted magnetic moments for carriers in the conduction and valence bands. The relative intensity of neutral and charged exciton emission is modified by the magnetic field, reflecting the creation of field-induced valley polarization. At high doping levels, the Zeeman shift of the charged exciton increases to ∓0.18 meV/T. This enhancement is attributed to many-body effects on the binding energy of the charged excitons.
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Cites
Spin and pseudospins in layered transition metal dichalcogenides
Xu, X., Yao, W., Xiao, D., & Heinz, T. F. (2014) · Nature Physics · doi:10.1038/nphys2942 · Cited by 2,855
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Photonics and optoelectronics of 2D semiconductor transition metal dichalcogenides
Mak, K. F., & Shan, J. (2016) · Nature Photonics · doi:10.1038/nphoton.2015.282 · Cited by 3,819
Schaibley, J. R., Yu, H., Clark, G., Rivera, P., Ross, J. S., Seyler, K. L., Yao, W., & Xu, X. (2016) · Nature Reviews Materials · doi:10.1038/natrevmats.2016.55 · Cited by 2,652
k · p theory for two-dimensional transition metal dichalcogenide semiconductors
Kormányos, A., Burkard, G., Gmitra, M., Fabian, J., Zólyomi, V., Drummond, N. D., & Fal’ko, V. (2015) · 2D Materials · doi:10.1088/2053-1583/2/2/022001 · Cited by 1,076
Single quantum emitters in monolayer semiconductors
He, Y.-M., Clark, G., Schaibley, J. R., He, Y., Chen, M.-C., Wei, Y.-J., Ding, X., Zhang, Q., Yao, W., Xu, X., et al. (2015) · Nature Nanotechnology · doi:10.1038/nnano.2015.75 · Cited by 1,020
Optically active quantum dots in monolayer WSe2
Srivastava, A., Sidler, M., Allain, A. V., Lembke, D. S., Kis, A., & Imamoğlu, A. (2015) · Nature Nanotechnology · doi:10.1038/nnano.2015.60 · Cited by 871
Metadata
- Authors
- Li, Y., Ludwig, J., Low, T., Chernikov, A., Cui, X., Arefe, G., Kim, Y. D., van der Zande, A. M., Rigosi, A., Hill, H. M., Kim, S. H., Hone, J., Li, Z., Smirnov, D., & Heinz, T. F.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2014-12-23
- Volume
- 113
- Issue
- 26
- Pages
- 266804-266804
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2052256037
- Cited by
- 514
- References
- 1
- FWCI
- 16.98
- Type
- journal article
- Language
- en
- Open access
- green
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- Li, Y., Ludwig, J., Low, T., Chernikov, A., Cui, X., Arefe, G., Kim, Y. D., van der Zande, A. M., Rigosi, A., Hill, H. M., Kim, S. H., Hone, J., Li, Z., Smirnov, D., & Heinz, T. F. (2014). Valley Splitting and Polarization by the Zeeman Effect in MonolayerMoSe2. Physical Review Letters. https://doi.org/10.1103/physrevlett.113.266804
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