Show simple item record NIKA, D. L. COCEMASOV, A. I. BALANDIN, A. A. 2022-05-16T06:19:46Z 2022-05-16T06:19:46Z 2015
dc.identifier.citation NIKA, D. L., COCEMASOV, A. I., BALANDIN, A. A. Hybrid folded phonons in twisted graphene. In: Science and Society- the Use of Light: Workshop în cadrul conf. ICNBME - International Conference on Nanotechnologies and Biomedical Engineering, 24-25 Sept, 2015, Chişinău, Republic of Moldova: Abstracts, 2015, p. 22. en_US
dc.description Only Abstract
dc.description.abstract We theoretically investigated phonon dispersion and specific heat in AA-stacked, AB-stacked and twisted bilayer graphene with various rotation angles. Twisting bilayer graphene leads to emergence of new phonon branches – termed hybrid folded phonons – which originate from mixing of phonon modes from different high-symmetry directions in the Brillouin zone. The frequencies of the hybrid folded phonon depend strongly on the rotation angle and can be used for non-contact identification of the twist angles in graphene samples. It was also shown that the dispersion of the out-of-plane acoustic phonons – referred to as ZA phonons – deviates strongly from a parabolic law starting from the frequencies as low as ~100 cm-1. This leads to the frequency-dependent ZA phonon density of states and the breakdown of the linear dependence of the specific heat on temperature. en_US
dc.language.iso en en_US
dc.publisher Technical University of Moldova en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri *
dc.subject bilayer graphene en_US
dc.subject graphene en_US
dc.subject hybrid folded phonons en_US
dc.subject phonons en_US
dc.subject phonon dispersion en_US
dc.title Hybrid folded phonons in twisted graphene en_US
dc.type Article en_US

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