Sublattice imbalance of substitutionally doped nitrogen in graphene

Motivated by the recently observed sublattice asymmetry of substitutional nitrogen impurities in CVD grown graphene, we show, in a mathematically transparent manner, that oscillations in the local density of states driven by the presence of substitutional impurities are responsible for breaking the...

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Principais autores:	Lawlor, James A., Gorman, Paul D., Power, Stephen R., Bezerra, Claudionor Gomes, Ferreira, Mauro S.
Formato:	article
Idioma:	English
Publicado em:	Elsevier
Assuntos:	Nitrogen impurities Sublattice
Endereço do item:	https://repositorio.ufrn.br/jspui/handle/123456789/29445
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id	ri-123456789-29445
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spelling	ri-123456789-294452023-01-30T21:57:44Z Sublattice imbalance of substitutionally doped nitrogen in graphene Lawlor, James A. Gorman, Paul D. Power, Stephen R. Bezerra, Claudionor Gomes Ferreira, Mauro S. Nitrogen impurities Sublattice Nitrogen impurities Motivated by the recently observed sublattice asymmetry of substitutional nitrogen impurities in CVD grown graphene, we show, in a mathematically transparent manner, that oscillations in the local density of states driven by the presence of substitutional impurities are responsible for breaking the sublattice symmetry. While these oscillations are normally averaged out in the case of randomly dispersed impurities, in graphene they have either the same, or very nearly the same, periodicity as the lattice. As a result, the total interaction energy of randomly distributed impurities embedded in the conduction-electron-filled medium does not vanish and is lowered when their configuration is sublattice-asymmetric. We also identify the presence of a critical concentration of nitrogen above which one should expect the sublattice asymmetry to disappear. This feature is not particular to nitrogen dopants, but should be present in other impurities 2020-07-03T18:34:23Z 2020-07-03T18:34:23Z 2014-10 article LAWLOR, J.A.; GORMAN, P. D.; POWER, S. R.; BEZERRA, C.G.; FERREIRA, M. S.. Sublattice imbalance of substitutionally doped nitrogen in graphene. Carbon (New York), v. 77, p. 645, 2014. Disponível em: https://www.sciencedirect.com/science/article/pii/S0008622314005235?via%3Dihub. Acesso em:03 jul.2020. https://doi.org/10.1016/j.carbon.2014.05.069. 0008-6223 https://repositorio.ufrn.br/jspui/handle/123456789/29445 10.1016/j.carbon.2014.05.069 en Elsevier
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Nitrogen impurities Sublattice Nitrogen impurities
spellingShingle	Nitrogen impurities Sublattice Nitrogen impurities Lawlor, James A. Gorman, Paul D. Power, Stephen R. Bezerra, Claudionor Gomes Ferreira, Mauro S. Sublattice imbalance of substitutionally doped nitrogen in graphene
description	Motivated by the recently observed sublattice asymmetry of substitutional nitrogen impurities in CVD grown graphene, we show, in a mathematically transparent manner, that oscillations in the local density of states driven by the presence of substitutional impurities are responsible for breaking the sublattice symmetry. While these oscillations are normally averaged out in the case of randomly dispersed impurities, in graphene they have either the same, or very nearly the same, periodicity as the lattice. As a result, the total interaction energy of randomly distributed impurities embedded in the conduction-electron-filled medium does not vanish and is lowered when their configuration is sublattice-asymmetric. We also identify the presence of a critical concentration of nitrogen above which one should expect the sublattice asymmetry to disappear. This feature is not particular to nitrogen dopants, but should be present in other impurities
format	article
author	Lawlor, James A. Gorman, Paul D. Power, Stephen R. Bezerra, Claudionor Gomes Ferreira, Mauro S.
author_facet	Lawlor, James A. Gorman, Paul D. Power, Stephen R. Bezerra, Claudionor Gomes Ferreira, Mauro S.
author_sort	Lawlor, James A.
title	Sublattice imbalance of substitutionally doped nitrogen in graphene
title_short	Sublattice imbalance of substitutionally doped nitrogen in graphene
title_full	Sublattice imbalance of substitutionally doped nitrogen in graphene
title_fullStr	Sublattice imbalance of substitutionally doped nitrogen in graphene
title_full_unstemmed	Sublattice imbalance of substitutionally doped nitrogen in graphene
title_sort	sublattice imbalance of substitutionally doped nitrogen in graphene
publisher	Elsevier
publishDate	2020
url	https://repositorio.ufrn.br/jspui/handle/123456789/29445
work_keys_str_mv	AT lawlorjamesa sublatticeimbalanceofsubstitutionallydopednitrogeningraphene AT gormanpauld sublatticeimbalanceofsubstitutionallydopednitrogeningraphene AT powerstephenr sublatticeimbalanceofsubstitutionallydopednitrogeningraphene AT bezerraclaudionorgomes sublatticeimbalanceofsubstitutionallydopednitrogeningraphene AT ferreiramauros sublatticeimbalanceofsubstitutionallydopednitrogeningraphene
_version_	1773965756383363072

Sublattice imbalance of substitutionally doped nitrogen in graphene

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