The shear mode of multilayer graphene
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Authors
Tan, PH
Han, WP
Zhao, WJ
Wu, ZH
Chang, K
Wang, H
Wang, YF
Bonini, N
Marzari, N
Pugno, N
Savini, G
Publication Date
2012-02-05Journal Title
Nature Materials
ISSN
1476-1122
Type
Article
Metadata
Show full item recordCitation
Tan, P., Han, W., Zhao, W., Wu, Z., Chang, K., Wang, H., Wang, Y., et al. (2012). The shear mode of multilayer graphene. Nature Materials https://doi.org/10.1038/nmat3245
Abstract
The quest for materials capable of realizing the next generation of electronic and photonic devices continues to fuel research on the electronic, optical and vibrational properties of graphene. Few-layer graphene (FLG) flakes with less than ten layers each show a distinctive band structure. Thus, there is an increasing interest in the physics and applications of FLGs. Raman spectroscopy is one of the most useful and versatile tools to probe graphene samples. Here, we uncover the interlayer shear mode of FLGs, ranging from bilayer graphene (BLG) to bulk graphite, and suggest that the corresponding Raman peak measures the interlayer coupling. This peak scales from ~43 cm−1 in bulk graphite to ~31 cm−1 in BLG. Its low energy makes it sensitive to near-Dirac point quasiparticles. Similar shear modes are expected in all layered materials, providing a direct probe of interlayer interactions.
Sponsorship
Engineering and Physical Sciences Research Council (EP/G042357/1)
Identifiers
External DOI: https://doi.org/10.1038/nmat3245
This record's URL: https://www.repository.cam.ac.uk/handle/1810/286109
Rights
Licence:
http://www.rioxx.net/licenses/all-rights-reserved
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