The shear mode of multilayer graphene.

By P. Tan, W. Han, Weijie Zhao, Zhenhua Wu, Kai Chang, H. Wang, Y. Wang, N. Bonini, Nicola Marzari, Nicola Maria Pugno and 3 more. Nature Materials, 2011

626 citations recorded by the source corpus.

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.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/21f6b2d134e75c4bad809824c6b055f7531bc8f9

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

Citations in the corpus

Interlayer interactions in anisotropic atomically thin rhenium diselenide (2015, background): “The likely reason for the absence of other C and LB modes is their much weaker electron phonon coupling compared to the lowest frequency modes, which is similar to the case of the highest frequency C modes in multilayer graphene [36].”
Production and processing of graphene and related materials (2020, methodology): “(c) Pos(C) and Pos(G) as a function of 1/N [1514].”