The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.
Beyond Graphene: Stable Elemental Monolayers of Silicene and Germanene
Abstract
Two-dimensional materials are one of the most active areas of nanomaterials research. Here we report the structural stability, electronic and vibrational properties of different monolayer configurations of the group IV elemental materials silicene and germanene. The structure of the stable configuration is calculated and for planar and low (<1 Å) atomic buckling configurations, analysis of the electronic band structure reveals linear band dispersion giving rise to massless Dirac Fermions with a Fermi velocity about two-thirds that of graphene. Monolayer stability is shown to be directly attributed to the phonons present with the instability being driven by the out-of-plane ZA and ZO phonon modes. Long momentum relaxation lengths and high carrier mobilities are predicted for silicene and germanene based devices as carrier relaxation via phonon scattering is found to be inhibited as the electron-optical phonon coupling matrix elements are calculated to be small, being about a factor of 25 times smaller than in graphene. The consequences for phonon scattering, high energy electrical transport and integration of elemental monolayers into electronic devices are further discussed.
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Cites
Electric Field Effect in Atomically Thin Carbon Films
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Cited by
Rise of silicene: A competitive 2D material
Zhao, J., Liu, H., Yu, Z., Quhe, R., Zhou, S., Wang, Y., Liu, C. C., Zhong, H., Han, N., Lu, J., et al. (2016) · Progress in Materials Science · doi:10.1016/j.pmatsci.2016.04.001 · Cited by 891
Emerging Applications of Elemental 2D Materials
Glavin, N. R., Rao, R., Varshney, V., Bianco, E., Apte, A., Roy, A., Ringe, E., & Ajayan, P. M. (2020) · Advanced Materials · doi:10.1002/adma.201904302 · Cited by 655
Germanene: the germanium analogue of graphene
Acun, A., Zhang, L., Bampoulis, P., Farmanbar, M., van Houselt, A., Rudenko, A. N., Lingenfelder, M., Brocks, G., Poelsema, B., Katsnelson, M. I., et al. (2015) · Journal of Physics: Condensed Matter · doi:10.1088/0953-8984/27/44/443002 · Cited by 502
The rare two-dimensional materials with Dirac cones
Wang, J., Deng, S., Liu, Z., & Liu, Z. (2015) · National Science Review · doi:10.1093/nsr/nwu080 · Cited by 447
Elemental two-dimensional nanosheets beyond graphene
Kong, X., Liu, Q., Zhang, C., Peng, Z., & Chen, Q. (2017) · Chemical Society Reviews · doi:10.1039/c6cs00937a · Cited by 346
Metadata
- Authors
- Roome, N. J., & Carey, J. D.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-04-28
- Volume
- 6
- Issue
- 10
- Pages
- 7743-7750
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2083967144
- Cited by
- 306
- References
- 27
- FWCI
- 14.15
- Type
- journal article
- Language
- en
- Open access
- closed
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