Graphene phonon softening and splitting by directional straining
Strain-induced graphenephonon 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...
| Egile Nagusiak: | , , , , , |
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| Beste egile batzuk: | |
| Formatua: | Journal Article |
| Hizkuntza: | English |
| Argitaratua: |
2015
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| Gaiak: | |
| Sarrera elektronikoa: | https://hdl.handle.net/10356/80981 http://hdl.handle.net/10220/39016 |
| Gaia: | Strain-induced graphenephonon 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 C3vbond 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. |
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