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Influence of Excited Carriers on the Optical and Electronic Properties of MoS2
Abstract
We study the ground-state and finite-density optical response of molybdenum disulfide by solving the semiconductor Bloch equations, using ab initio band structures and Coulomb interaction matrix elements. Spectra for excited carrier densities up to 10(13) cm(-2) reveal a redshift of the excitonic ground-state absorption, whereas higher excitonic lines are found to disappear successively due to Coulomb-induced band gap shrinkage of more than 500 meV and binding-energy reduction. Strain-induced band variations lead to a redshift of the lowest exciton line by ∼110 meV/% and change the direct transition to indirect while maintaining the magnitude of the optical response.
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Cites
Electronics and optoelectronics of two-dimensional transition metal dichalcogenides
Wang, Q. H., Kalantar-Zadeh, K., Kis, A., Coleman, J. N., & Strano, M. S. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.193 · Cited by 16,374
Electronic excitations: density-functional versus many-body Green’s-function approaches
Onida, G., Reining, L., & Rubio, A. (2002) · Reviews of Modern Physics · doi:10.1103/revmodphys.74.601 · Cited by 4,155
Cited by
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
Hill, H. M., Rigosi, A. F., Roquelet, C., Chernikov, A., Berkelbach, T. C., Reichman, D. R., Hybertsen, M. S., Brus, L. E., & Heinz, T. F. (2015) · Nano Letters · doi:10.1021/nl504868p · Cited by 403
Lightwave valleytronics in a monolayer of tungsten diselenide
Langer, F., Schmid, C. P., Schlauderer, S., Gmitra, M., Fabian, J., Nagler, P., Schüller, C., Korn, T., Hawkins, P. G., Steiner, J. T., et al. (2018) · Nature · doi:10.1038/s41586-018-0013-6 · Cited by 284
Metadata
- Authors
- Steinhoff, A., Rösner, M., Jahnke, F., Wehling, T. O., & Gies, C.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-06-26
- Volume
- 14
- Issue
- 7
- Pages
- 3743-3748
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2315678872
- Cited by
- 253
- References
- 2
- FWCI
- 8.19
- Type
- journal article
- Language
- en
- Open access
- closed
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