Phagraphene: A Low-Energy Graphene Allotrope Composed of 5–6–7 Carbon Rings with Distorted Dirac Cones
Using systematic evolutionary structure searching we propose a new carbon allotrope, phagraphene [fæ’græfi:n], standing for penta-hexa-hepta-graphene, because the structure is composed of 5-6-7 carbon rings. This two-dimensional (2D) carbon structure is lower in energy than most of the predicted 2D...
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| Veröffentlicht in: | Nano letters 2015-09, Vol.15 (9), p.6182-6186 |
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| container_issue | 9 |
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| container_title | Nano letters |
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| creator | Wang, Zhenhai Zhou, Xiang-Feng Zhang, Xiaoming Zhu, Qiang Dong, Huafeng Zhao, Mingwen Oganov, Artem R |
| description | Using systematic evolutionary structure searching we propose a new carbon allotrope, phagraphene [fæ’græfi:n], standing for penta-hexa-hepta-graphene, because the structure is composed of 5-6-7 carbon rings. This two-dimensional (2D) carbon structure is lower in energy than most of the predicted 2D carbon allotropes due to its sp2-binding features and density of atomic packing comparable to graphene. More interestingly, the electronic structure of phagraphene has distorted Dirac cones. The direction-dependent cones are further proved to be robust against external strain with tunable Fermi velocities. |
| doi_str_mv | 10.1021/acs.nanolett.5b02512 |
| format | Article |
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| language | eng |
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| source | American Chemical Society Journals |
| subjects | Allotropy Atomic structure Carbon Cones Density Distortion Graphene Two dimensional |
| title | Phagraphene: A Low-Energy Graphene Allotrope Composed of 5–6–7 Carbon Rings with Distorted Dirac Cones |
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