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Crystal symmetry breaking in few-quintuple Bi2Te3 films: Applications in nanometrology of topological insulators
Open accessAbstract
The authors report results of micro-Raman spectroscopy investigation of mechanically exfoliated single-crystal bismuth telluride films with thickness ranging from a few-nanometers to bulk limit. It is found that the optical phonon mode A1u, which is not-Raman active in bulk Bi2Te3 crystals, appears in the atomically-thin films due to crystal-symmetry breaking. The intensity ratios of the out-of-plane A1u and A1g modes to the in-plane Eg mode grow with decreasing film thickness. The evolution of Raman signatures with the film thickness can be used for identification of Bi2Te3 crystals with the thickness of few-quintuple layers important for topological insulator and thermoelectric applications.
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Cites
Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
Bernevig, B. A., Hughes, T. L., & Zhang, S.-C. (2006) · Science · doi:10.1126/science.1133734 · Cited by 7,090
Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
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Quantum Spin Hall Insulator State in HgTe Quantum Wells
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Topological insulators with inversion symmetry
Fu, L., & Kane, C. L. (2007) · Physical Review B · doi:10.1103/physrevb.76.045302 · Cited by 4,252
Observation of a large-gap topological-insulator class with a single Dirac cone on the surface
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A topological Dirac insulator in a quantum spin Hall phase
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Cited by
Topological insulators and superconductors
Qi, X.-L., & Zhang, S.-C. (2011) · Reviews of Modern Physics · doi:10.1103/revmodphys.83.1057 · Cited by 14,394
Progress, Challenges, and Opportunities in Two-Dimensional Materials Beyond Graphene
Butler, S. Z., Hollen, S. M., Cao, L., Cui, Y., Gupta, J. A., Gutiérrez, H. R., Heinz, T. F., Hong, S. S., Huang, J., Ismach, A. F., et al. (2013) · ACS Nano · doi:10.1021/nn400280c · Cited by 4,878
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Metadata
- Authors
- Shahil, K. M. F., Hossain, M. Z., Teweldebrhan, D., & Balandin, A. A.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2010-04-12
- Volume
- 96
- Issue
- 15
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2081085780
- Cited by
- 196
- References
- 6
- FWCI
- 10.51
- Type
- journal article
- Language
- en
- Open access
- green
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- Shahil, K. M. F., Hossain, M. Z., Teweldebrhan, D., & Balandin, A. A. (2010). Crystal symmetry breaking in few-quintuple Bi2Te3 films: Applications in nanometrology of topological insulators. Applied Physics Letters. https://doi.org/10.1063/1.3396190
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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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