dc.contributor.author | NIKA, D. L. | |
dc.contributor.author | COCEMASOV, A. I. | |
dc.contributor.author | BALANDIN, A. A. | |
dc.date.accessioned | 2022-05-16T06:19:46Z | |
dc.date.available | 2022-05-16T06:19:46Z | |
dc.date.issued | 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.identifier.uri | http://repository.utm.md/handle/5014/20287 | |
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 | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
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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