Two-phonon Raman bands of bilayer graphene: revisited
arXiv:1504.04980 · doi:10.1016/j.carbon.2015.05.020
Abstract
We present complete calculations of the two-phonon Raman bands of bilayer graphene, including all overtone and combination modes, within a density-functional tight-binding model. Based on our results, we assign unambiguously the observed two-phonon Raman bands to two-phonon modes, thus resolving the existing controversies. In particular, we show that both overtone and combination modes have essential contribution to the 2D band, bringing about specific modifications of the band shape. We argue that a mid-range two-phonon Raman band, previously assigned to the 2ZO mode, should be assigned to the TOZO' mode. We find that the Raman band, usually assigned to the LOLA mode, has significant contribution from the TOZO mode. The predicted Raman bands can be used for assignment of the observed ones in the Raman spectra of bilayer graphene for the needs of sample characterization for future technological applications.
References in corpus (14)
- The electronic properties of graphene
- The Raman Fingerprint of Graphene
- The electronic properties of bilayer graphene
- Theory of double-resonant Raman spectra in graphene: intensity and line shape of defect-induced and two-phonon bands
- Probing the Electronic Structure of Bilayer Graphene by Raman Scattering
- Phonon dispersions and vibrational properties of monolayer, bilayer, and trilayer graphene
- Observation of out-of-plane vibrations in few-layer graphene
- Layer breathing modes in few-layer graphene
- Excitation Energy Dependent Raman Signatures of ABA- and ABC-stacked Few-layer Graphene
- Layer number determination in graphene using out-of-plane vibrations
- Two-dimensional analysis of the double-resonant 2D Raman mode in bilayer graphene
- On the inner Double-Resonance Raman scattering process in bilayer graphene
- Polarization dependence of double resonant Raman scattering band in bilayer graphene
- Low-frequency phonons of few-layer graphene within a tight-binding model
Cited by in corpus (3)
- Probing interlayer interactions and commensurate-incommensurate transition in twisted bilayer graphene through Raman spectroscopy
- Infrared resonance Raman of bilayer graphene: signatures of massive fermions and band structure on the 2D peak
- Addressing Raman features of individual layers in isotopically labeled Bernal stacked bilayer graphene