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Tightly Bound Excitons in MonolayerWSe2
Open accessAbstract
Exciton binding energy and excited states in monolayers of tungsten diselenide (WSe(2)) are investigated using the combined linear absorption and two-photon photoluminescence excitation spectroscopy. The exciton binding energy is determined to be 0.37 eV, which is about an order of magnitude larger than that in III-V semiconductor quantum wells and renders the exciton excited states observable even at room temperature. The exciton excitation spectrum with both experimentally determined one- and two-photon active states is distinct from the simple two-dimensional (2D) hydrogenic model. This result reveals significantly reduced and nonlocal dielectric screening of Coulomb interactions in 2D semiconductors. The observed large exciton binding energy will also have a significant impact on next-generation photonics and optoelectronics applications based on 2D atomic crystals.
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Smoothing and Differentiation of Data by Simplified Least Squares Procedures.
Savitzky, A., & Golay, M. J. E. (1964) · Analytical Chemistry · doi:10.1021/ac60214a047 · Cited by 21,904
Cited by
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
Self-citationSchaibley, 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
Polaritons in layered two-dimensional materials
Low, T., Chaves, A., Caldwell, J. D., Kumar, A., Fang, N. X., Avouris, P., Heinz, T. F., Guinea, F., Martin-Moreno, L., & Koppens, F. (2017) · Nature Materials · doi:10.1038/nmat4792 · Cited by 1,317
Ye, Y., Wong, Z. J., Lu, X., Ni, X., Zhu, H., Chen, X., Wang, Y., & Zhang, X. (2015) · Nature Photonics · doi:10.1038/nphoton.2015.197 · Cited by 624
Samadi, M., Sarikhani, N., Zirak, M., Zhang, H., Zhang, H.-L., & Moshfegh, A. Z. (2018) · Nanoscale Horizons · doi:10.1039/c7nh00137a · Cited by 408
Metadata
- Authors
- He, K., Kumar, N., Zhao, L., Wang, Z., Mak, K. F., Zhao, H., & Shan, J.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2014-07-10
- Volume
- 113
- Issue
- 2
- Pages
- 026803-026803
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2125086348
- Cited by
- 1,243
- References
- 1
- FWCI
- 44.82
- Type
- journal article
- Language
- en
- Open access
- bronze
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- He, K., Kumar, N., Zhao, L., Wang, Z., Mak, K. F., Zhao, H., & Shan, J. (2014). Tightly Bound Excitons in MonolayerWSe2. Physical Review Letters. https://doi.org/10.1103/physrevlett.113.026803
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