The DOI matches its Crossref record; 47 of the 47 references it cites were found in a registry or an index.
Direct measurement of exciton valley coherence in monolayer WSe2
Open accessAbstract
Coherent valley exciton dynamics are directly probed in a monolayer transition metal dichalcogenide, providing access to the valley coherence time and decoherence mechanisms — crucial for developing methods for manipulating the valley pseudospin. In crystals, energy band extrema in momentum space can be identified by a valley index. The internal quantum degree of freedom associated with valley pseudospin indices can act as a useful information carrier, analogous to electronic charge or spin1,2,3,4. Interest in valleytronics has been revived in recent years following the discovery of atomically thin materials such as graphene and transition metal dichalcogenides5,6,7. However, the valley coherence time—a crucial quantity for valley pseudospin manipulation—is difficult to directly probe. In this work, we use two-dimensional coherent spectroscopy to resonantly generate and detect valley coherence of excitons (Coulomb-bound electron–hole pairs) in monolayer WSe2 (refs 8,9). The imposed valley coherence persists for approximately one hundred femtoseconds. We propose that the electron–hole exchange interaction provides an important decoherence mechanism in addition to exciton population recombination. This work provides critical insight into the requirements and strategies for optical manipulation of the valley pseudospin for future valleytronics applications.
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Cites
Atomically Thin MoS 2 : A New Direct-Gap Semiconductor
Mak, K. F., Lee, C., Hone, J., Shan, J., & Heinz, T. F. (2010) · Physical Review Letters · doi:10.1103/physrevlett.105.136805 · Cited by 15,586
Two-dimensional atomic crystals
Novoselov, K. S., Jiang, D., Schedin, F., Booth, T. J., Khotkevich, V. V., Morozov, S. V., & Geim, A. K. (2005) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0502848102 · Cited by 11,788
Emerging Photoluminescence in Monolayer MoS2
Splendiani, A., Sun, L., Zhang, Y., Li, T., Kim, J., Chim, C.-Y., Galli, G., & Wang, F. (2010) · Nano Letters · doi:10.1021/nl903868w · Cited by 9,501
Self-citationCoupled Spin and Valley Physics in Monolayers ofMoS2and Other Group-VI Dichalcogenides
Xiao, D., Liu, G.-B., Feng, W., Xu, X., & Yao, W. (2012) · Physical Review Letters · doi:10.1103/physrevlett.108.196802 · Cited by 5,152
Control of valley polarization in monolayer MoS2 by optical helicity
Mak, K. F., He, K., Shan, J., & Heinz, T. F. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.96 · Cited by 4,034
Valley polarization in MoS2 monolayers by optical pumping
Zeng, H., Dai, J., Yao, W., Xiao, D., & Cui, X. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.95 · Cited by 3,693
Observation of electromagnetically induced transparency
Boller, K.-J., Imamoğlu, A., & Harris, S. E. (1991) · Physical Review Letters · doi:10.1103/physrevlett.66.2593 · Cited by 3,058
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
Valley-selective circular dichroism of monolayer molybdenum disulphide
Cao, T., Wang, G., Han, W., Ye, H., Zhu, C., Shi, J., Niu, Q., Tan, P., Wang, E., Liu, B., et al. (2012) · Nature Communications · doi:10.1038/ncomms1882 · Cited by 2,605
Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer WS2
Chernikov, A., Berkelbach, T. C., Hill, H. M., Rigosi, A., Li, Y., Aslan, B., Reichman, D. R., Hybertsen, M. S., & Heinz, T. F. (2014) · Physical Review Letters · doi:10.1103/physrevlett.113.076802 · Cited by 2,546
Cited by
Light–valley interactions in 2D semiconductors
Mak, K. F., Xiao, D., & Shan, J. (2018) · Nature Photonics · doi:10.1038/s41566-018-0204-6 · Cited by 502
Magnetic brightening and control of dark excitons in monolayer WSe2
Zhang, X.-X., Cao, T., Lu, Z., Lin, Y.-C., Zhang, F., Wang, Y., Li, Z., Hone, J. C., Robinson, J. A., Smirnov, D., et al. (2017) · Nature Nanotechnology · doi:10.1038/nnano.2017.105 · Cited by 445
Observation of ultralong valley lifetime in WSe 2 /MoS 2 heterostructures
Kim, J., Jin, C., Chen, B., Cai, H., Zhao, T., Lee, P., Kahn, S., Watanabe, K., Taniguchi, T., Tongay, S., et al. (2017) · Science Advances · doi:10.1126/sciadv.1700518 · Cited by 304
Metadata
- Authors
- Hao, K., Moody, G., Wu, F., Dass, C. K., Xu, L., Chen, C.-H., Sun, L., Li, M.-Y., Li, L.-J., MacDonald, A. H., & Li, X.
- Venue
- Nature Physics
- Published
- 2016-02-29
- Volume
- 12
- Issue
- 7
- Pages
- 677-682
- ISSN
- 1745-2473 (ISSN-L)
- 1745-2481
- OpenAlex
- W2240067117
- Cited by
- 317
- References
- 47
- FWCI
- 17.61
- Type
- journal article
- Language
- en
- Open access
- green
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- Hao, K., Moody, G., Wu, F., Dass, C. K., Xu, L., Chen, C.-H., Sun, L., Li, M.-Y., Li, L.-J., MacDonald, A. H., & Li, X. (2016). Direct measurement of exciton valley coherence in monolayer WSe2. Nature Physics. https://doi.org/10.1038/nphys3674
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