CUED Publications database

The shear mode of multilayer graphene

Tan, PH and Han, WP and Zhao, WJ and Wu, ZH and Chang, K and Wang, H and Wang, YF and Bonini, N and Marzari, N and Pugno, N and Savini, G and Lombardo, A and Ferrari, AC (2012) The shear mode of multilayer graphene. Nature Materials, 11. pp. 294-300. ISSN 1476-1122

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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 ∼43cm -1 in bulk graphite to ∼31cm -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. © 2012 Macmillan Publishers Limited. All rights reserved.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:24
Last Modified: 16 Dec 2014 19:05
DOI: 10.1038/nmat3245