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Graphene phonon softening and splitting by directional straining.
- Source :
- Applied Physics Letters; 11/16/2015, Vol. 107 Issue 20, p203105-1-203105-3, 3p, 1 Diagram, 1 Chart, 1 Graph
- Publication Year :
- 2015
-
Abstract
- Strain-induced graphene phonon softening and phonon band splitting are indeed fascinating, which were attributed to the phonon double resonant scattering without intrinsic involvement of C-C bond relaxation. Here, we show that the lengthening and weakening of the C-C bond softens the phonon and that the mismatching between the uniaxial strain and the C<subscript>3v</subscript> bond geometry splits the band. In addition to the force constant of 11.8 N/m for a C-C bond in graphene, consistency between theory and measurements derives that if the strain is along a bond, maximal band splitting happens; if the strain is perpendicular, no band splitting occurs. [ABSTRACT FROM AUTHOR]
- Subjects :
- GRAPHENE
CARBON
PHONON softening
CARBON products manufacturing
CARBON foams
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 107
- Issue :
- 20
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 111178251
- Full Text :
- https://doi.org/10.1063/1.4935604