Abstract
The lattice dynamics properties are investigated for twisting bilayer graphene. There are big jumps for the inter-layer potential at twisting angle θ 0 ° and 60°, implying the stability of Bernal-stacking and the instability of AA-stacking structures, while a long platform in [8,55]° indicates the ease of twisting bilayer graphene in this wide angle range. Significant frequency shifts are observed for the z breathing mode around θ 0 ° and 60°, while the frequency is a constant in a wide range [8,55]°. Using the z breathing mode, a mechanical nanoresonator is proposed to operate on a robust resonant frequency in terahertz range.
Original language | English |
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Article number | 023113 |
Journal | Applied Physics Letters |
Volume | 101 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2012 Jul 9 |
Bibliographical note
Funding Information:We thank Professor J.-S. Wang at NUS for helpful discussions. The work is supported in part by the Grant Research Foundation (DFG).
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)