Friedel oscillations in graphene: Sublattice asymmetry in doping
Symmetry breaking perturbations in an electronically conducting medium are known to produce Friedel oscillations in various physical quantities of an otherwise pristine material. Here we show in a mathematically transparent fashion that Friedel oscillations in graphene have a strong sublattice asymm...
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| Veröffentlicht in: | Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2013-11, Vol.88 (20), Article 205416 |
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| container_title | Physical review. B, Condensed matter and materials physics |
| container_volume | 88 |
| creator | Lawlor, J. A. Power, S. R. Ferreira, M. S. |
| description | Symmetry breaking perturbations in an electronically conducting medium are known to produce Friedel oscillations in various physical quantities of an otherwise pristine material. Here we show in a mathematically transparent fashion that Friedel oscillations in graphene have a strong sublattice asymmetry. As a result, the presence of impurities and/or defects may impact the distinct graphene sublattices very differently. Furthermore, such an asymmetry can be used to explain the recent observations that nitrogen atoms and dimers are not randomly distributed in graphene but prefer to occupy one of its two distinct sublattices. We argue that this feature is not exclusive of nitrogen and that it can be seen with other substitutional dopants. |
| doi_str_mv | 10.1103/PhysRevB.88.205416 |
| format | Article |
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| identifier | ISSN: 1098-0121 |
| ispartof | Physical review. B, Condensed matter and materials physics, 2013-11, Vol.88 (20), Article 205416 |
| issn | 1098-0121 1550-235X |
| language | eng |
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| source | American Physical Society Journals |
| subjects | Asymmetry Broken symmetry Condensed matter Dimers Dopants Graphene Oscillations Perturbation methods |
| title | Friedel oscillations in graphene: Sublattice asymmetry in doping |
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