Interlayer vibration of twisted bilayer graphene: A first-principles study
| Autor: | Zhao Liu, Dong-Bo Zhang, Hong-Quan Song |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Work (thermodynamics) Condensed matter physics Graphene Superlattice General Physics and Astronomy Moiré pattern Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences 010305 fluids & plasmas law.invention Vibration Shear (sheet metal) law Molecular vibration 0103 physical sciences 010306 general physics Bilayer graphene |
| Zdroj: | Physics Letters A. 383:2628-2632 |
| ISSN: | 0375-9601 |
| DOI: | 10.1016/j.physleta.2019.05.025 |
| Popis: | Multi-layered structures of graphene and other two dimensional materials are novel organizations with fascinating properties. In this work, we investigate the interlayer lattice dynamics of the Moire superlattice of twisted bilayer graphene (tBLG) using first-principles calculations. Due to the structural complexity, we calculate the frequencies of the interlayer breathing and shear vibrational modes of the tBLG without exploring all the degree of freedoms of the tBLG. Our calculation shows that the frequencies of breathing and shear modes display pronounced dependence on twisting angle, and compare well with the state of arts experimental measurements. We hint that the strategy employed here paves a route to the study of the interlayer vibrational properties of double layered two dimensional systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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