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The shear mode of multilayer graphene

Bonini performed the ab initio calculations of the structural and vibrational properties of multilayer graphene, including the phonon-phonon and electron-phonon interactions. His results were key to elucidate the experimental data for frequencies, linewidths and Raman intensities of the shear phonon modes. He also derived the general analytical formula for the frequency of the shear modes as a function of the number of layers, that is key to extract the interlayer coupling strength from the experimental data. he contributed to writing the paper: in particular, he has written the sections about the ab initio results and their comparison with experiments.