Polarization Charge Distribution in Gapped Graphene

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dc.creatorKotov, Valeri N.
dc.creatorPereira, Vitor M.
dc.creatorUchoa, Bruno
dc.date2008-06-07
dc.date2008-08-04
dc.date.accessioned2026-07-07T09:57:36Z
dc.date.available2026-07-07T09:57:36Z
dc.descriptionWe study the distribution of vacuum polarization charge induced by a Coulomb impurity in massive graphene. By analytically computing the polarization function, we show that the charge density is distributed in space in a non-trivial fashion, and on a characteristic length-scale set by the effective Compton wavelength. The density crosses over from a logarithmic behavior below this scale, to a power law variation above it. Our results in the continuum limit are confirmed by explicit diagonalization of the corresponding tight-binding model on a finite-size lattice. Electron-electron interaction effects are also discussed.
dc.description6 pages, 4 figures; expanded version
dc.identifierhttps://arxiv.org/abs/0806.1228
dc.identifierhttp://arxiv.org/abs/0806.1228
dc.identifierPhysical Review B 78, 075433 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.075433
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/167401
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titlePolarization Charge Distribution in Gapped Graphene
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