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Excitons in Boron Nitride Nanotubes: Dimensionality Effects
Open accessAbstract
We show that the optical absorption spectra of boron nitride (BN) nanotubes are dominated by strongly bound excitons. Our first-principles calculations indicate that the binding energy for the first and dominant excitonic peak depends sensitively on the dimensionality of the system, varying from 0.7 eV in bulk hexagonal BN via 2.1 eV in the single sheet of BN to more than 3 eV in the hypothetical (2, 2) tube. The strongly localized nature of this exciton dictates the fast convergence of its binding energy with increasing tube diameter towards the sheet value. The absolute position of the first excitonic peak is almost independent of the tube radius and system dimensionality. This provides an explanation for the observed "optical gap" constancy for different tubes and bulk hexagonal BN.
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Citations
Cites
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
Boron Nitride Nanotubes and Nanosheets
Golberg, D., Bando, Y., Huang, Y., Terao, T., Mitome, M., Tang, C., & Zhi, C. (2010) · ACS Nano · doi:10.1021/nn1006495 · Cited by 2,341
Layer-controlled band gap and anisotropic excitons in few-layer black phosphorus
Tran, V., Soklaski, R., Liang, Y., & Yang, L. (2014) · Physical Review B · doi:10.1103/physrevb.89.235319 · Cited by 2,337
Tunable Bandgap in Silicene and Germanene
Ni, Z., Liu, Q., Tang, K., Zheng, J., Zhou, J., Qin, R., Gao, Z., Yu, D., & Lu, J. (2012) · Nano Letters · doi:10.1021/nl203065e · Cited by 1,451
Strong Photoluminescence Enhancement of MoS2 through Defect Engineering and Oxygen Bonding
Nan, H., Wang, Z., Wang, W., Liang, Z., Lu, Y., Chen, Q., He, D., Tan, P., Miao, F., Wang, X., et al. (2014) · ACS Nano · doi:10.1021/nn500532f · Cited by 1,244
Phosphorene: from theory to applications
Carvalho, A., Wang, M., Zhu, X., Rodin, A. S., Su, H., & Castro Neto, A. H. (2016) · Nature Reviews Materials · doi:10.1038/natrevmats.2016.61 · Cited by 1,159
Metadata
- Authors
- Wirtz, L., Marini, A., & Rubio, A.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2006-03-30
- Volume
- 96
- Issue
- 12
- Pages
- 126104-126104
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2163078935
- Cited by
- 390
- References
- 1
- FWCI
- 13.24
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Wirtz, L., Marini, A., & Rubio, A. (2006). Excitons in Boron Nitride Nanotubes: Dimensionality Effects. Physical Review Letters. https://doi.org/10.1103/physrevlett.96.126104
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