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...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/80981 http://hdl.handle.net/10220/39016 |
| _version_ | 1826121218790522880 |
|---|---|
| author | Yang, X. X. Wang, Y. Li, J. W. Liao, W. H. Liu, Y. H. Sun, Chang Qing |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Yang, X. X. Wang, Y. Li, J. W. Liao, W. H. Liu, Y. H. Sun, Chang Qing |
| author_sort | Yang, X. X. |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T05:29:07Z |
| format | Journal Article |
| id | ntu-10356/80981 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:29:07Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/809812020-03-07T13:57:23Z Graphene phonon softening and splitting by directional straining Yang, X. X. Wang, Y. Li, J. W. Liao, W. H. Liu, Y. H. Sun, Chang Qing School of Electrical and Electronic Engineering Phonons Graphene Strain measurement Chemical bonds Diamond 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. Published version 2015-12-09T08:32:45Z 2019-12-06T14:18:50Z 2015-12-09T08:32:45Z 2019-12-06T14:18:50Z 2015 Journal Article Yang, X. X., Wang, Y., Li, J. W., Liao, W. H., Liu, Y. H., & Sun, C. Q. (2015). Graphene phonon softening and splitting by directional straining. Applied Physics Letters, 107, 203105-. 0003-6951 https://hdl.handle.net/10356/80981 http://hdl.handle.net/10220/39016 10.1063/1.4935604 en Applied Physics Letters © 2015 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC.. The published version is available at: [http://dx.doi.org/10.1063/1.4935604]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 3 p. application/pdf |
| spellingShingle | Phonons Graphene Strain measurement Chemical bonds Diamond Yang, X. X. Wang, Y. Li, J. W. Liao, W. H. Liu, Y. H. Sun, Chang Qing Graphene phonon softening and splitting by directional straining |
| title | Graphene phonon softening and splitting by directional straining |
| title_full | Graphene phonon softening and splitting by directional straining |
| title_fullStr | Graphene phonon softening and splitting by directional straining |
| title_full_unstemmed | Graphene phonon softening and splitting by directional straining |
| title_short | Graphene phonon softening and splitting by directional straining |
| title_sort | graphene phonon softening and splitting by directional straining |
| topic | Phonons Graphene Strain measurement Chemical bonds Diamond |
| url | https://hdl.handle.net/10356/80981 http://hdl.handle.net/10220/39016 |
| work_keys_str_mv | AT yangxx graphenephononsofteningandsplittingbydirectionalstraining AT wangy graphenephononsofteningandsplittingbydirectionalstraining AT lijw graphenephononsofteningandsplittingbydirectionalstraining AT liaowh graphenephononsofteningandsplittingbydirectionalstraining AT liuyh graphenephononsofteningandsplittingbydirectionalstraining AT sunchangqing graphenephononsofteningandsplittingbydirectionalstraining |