Structural reconstruction of the graphene monovacancy.
Two distinct configurations of the monovacancy in graphene have been observed using aberration-corrected transmission electron microscopy (AC-TEM) at 80 kV. The predicted lower energy asymmetric monovacancy (MV), exhibiting a Jahn-Teller reconstruction (r-MV), has been observed, but in addition, we...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2013
|
| _version_ | 1797066182916833280 |
|---|---|
| author | Robertson, A Montanari, B He, K Allen, C Wu, Y Harrison, N Kirkland, A Warner, J |
| author_facet | Robertson, A Montanari, B He, K Allen, C Wu, Y Harrison, N Kirkland, A Warner, J |
| author_sort | Robertson, A |
| collection | OXFORD |
| description | Two distinct configurations of the monovacancy in graphene have been observed using aberration-corrected transmission electron microscopy (AC-TEM) at 80 kV. The predicted lower energy asymmetric monovacancy (MV), exhibiting a Jahn-Teller reconstruction (r-MV), has been observed, but in addition, we have imaged instances of a symmetric monovacancy (s-MV). We have used geometric phase analysis (GPA) to quantitatively determine the strain in the lattice surrounding these two defect configurations and show that the Jahn-Teller reconstruction generates significant extra strain compared to the symmetric MV case. Density functional theory calculations demonstrate that our experimental images of the two different monovacancies show good agreement with both the low energy r-MV and the metastable structures. |
| first_indexed | 2024-03-06T21:38:45Z |
| format | Journal article |
| id | oxford-uuid:4729eb02-06f5-42a2-bde4-80d1b637b4b5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:38:45Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:4729eb02-06f5-42a2-bde4-80d1b637b4b52022-03-26T15:18:27ZStructural reconstruction of the graphene monovacancy.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4729eb02-06f5-42a2-bde4-80d1b637b4b5EnglishSymplectic Elements at Oxford2013Robertson, AMontanari, BHe, KAllen, CWu, YHarrison, NKirkland, AWarner, JTwo distinct configurations of the monovacancy in graphene have been observed using aberration-corrected transmission electron microscopy (AC-TEM) at 80 kV. The predicted lower energy asymmetric monovacancy (MV), exhibiting a Jahn-Teller reconstruction (r-MV), has been observed, but in addition, we have imaged instances of a symmetric monovacancy (s-MV). We have used geometric phase analysis (GPA) to quantitatively determine the strain in the lattice surrounding these two defect configurations and show that the Jahn-Teller reconstruction generates significant extra strain compared to the symmetric MV case. Density functional theory calculations demonstrate that our experimental images of the two different monovacancies show good agreement with both the low energy r-MV and the metastable structures. |
| spellingShingle | Robertson, A Montanari, B He, K Allen, C Wu, Y Harrison, N Kirkland, A Warner, J Structural reconstruction of the graphene monovacancy. |
| title | Structural reconstruction of the graphene monovacancy. |
| title_full | Structural reconstruction of the graphene monovacancy. |
| title_fullStr | Structural reconstruction of the graphene monovacancy. |
| title_full_unstemmed | Structural reconstruction of the graphene monovacancy. |
| title_short | Structural reconstruction of the graphene monovacancy. |
| title_sort | structural reconstruction of the graphene monovacancy |
| work_keys_str_mv | AT robertsona structuralreconstructionofthegraphenemonovacancy AT montanarib structuralreconstructionofthegraphenemonovacancy AT hek structuralreconstructionofthegraphenemonovacancy AT allenc structuralreconstructionofthegraphenemonovacancy AT wuy structuralreconstructionofthegraphenemonovacancy AT harrisonn structuralreconstructionofthegraphenemonovacancy AT kirklanda structuralreconstructionofthegraphenemonovacancy AT warnerj structuralreconstructionofthegraphenemonovacancy |