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Group theory analysis of phonons in two-dimensional transition metal dichalcogenides
Open accessAbstract
Transition metal dichalcogenides (TMDCs) have emerged as a new two-dimensional material's field since the monolayer and few-layer limits show different properties when compared to each other and to their respective bulk materials. For example, in some cases when the bulk material is exfoliated down to a monolayer, an indirect-to-direct band gap in the visible range is observed. The number of layers $N$ ($N$ even or odd) drives changes in space-group symmetry that are reflected in the optical properties. The understanding of the space-group symmetry as a function of the number of layers is therefore important for the correct interpretation of the experimental data. Here we present a thorough group theory study of the symmetry aspects relevant to optical and spectroscopic analysis, for the most common polytypes of TMDCs, i.e., $2Ha$, $2Hc$ and $1T$, as a function of the number of layers. Real space symmetries, the group of the wave vectors, the relevance of inversion symmetry, irreducible representations of the vibrational modes, optical activity, and Raman tensors are discussed.
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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
The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets
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Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
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Spin and pseudospins in layered transition metal dichalcogenides
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Highly Scalable, Atomically Thin WSe2 Grown via Metal–Organic Chemical Vapor Deposition
Eichfeld, S. M., Hossain, L., Lin, Y.-C., Piasecki, A. F., Kupp, B., Birdwell, A. G., Burke, R. A., Lu, N., Peng, X., Li, J., et al. (2015) · ACS Nano · doi:10.1021/nn5073286 · Cited by 416
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Carvalho, B. R., Wang, Y., Mignuzzi, S., Roy, D., Terrones, M., Fantini, C., Crespi, V. H., Malard, L. M., & Pimenta, M. A. (2017) · Nature Communications · doi:10.1038/ncomms14670 · Cited by 283
Metadata
- Authors
- Ribeiro-Soares, J., Almeida, R. M., Barros, E. B., Araujo, P. T., Dresselhaus, M. S., Cançado, L. G., & Jorio, A.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2014-09-29
- Volume
- 90
- Issue
- 11
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W2171053657
- Cited by
- 227
- References
- 6
- FWCI
- 7.89
- Type
- journal article
- Language
- en
- Open access
- green
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- Ribeiro-Soares, J., Almeida, R. M., Barros, E. B., Araujo, P. T., Dresselhaus, M. S., Cançado, L. G., & Jorio, A. (2014). Group theory analysis of phonons in two-dimensional transition metal dichalcogenides. Physical Review B. https://doi.org/10.1103/physrevb.90.115438
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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