Elementary Electronic Excitations in Graphene Nanoribbons

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dc.creatorBrey, L.
dc.creatorFertig, H. A.
dc.date2007-01-31
dc.date.accessioned2026-07-07T07:55:36Z
dc.date.available2026-07-07T07:55:36Z
dc.descriptionWe analyze the collective mode spectrum of graphene nanoribbons within the random phase approximation. In the undoped case, only metallic armchair nanoribbons support a propagating plasmon mode. Landau damping of this mode is shown to be suppressed through the chirality of the single particle wavefunctions. We argue that undoped zigzag nanoribbons should not support plasmon excitations because of a broad continuum of particle-hole excitations associated with surface states, into which collective modes may decay. Doped nanoribbons have properties similar to those of semiconductor nanowires, including a plasmon mode dispersing as $q\sqrt{-\ln qW}$ and a static dielectric response that is divergent at $q=2k_F$.
dc.description7 pages. 5 figures included
dc.identifierhttps://arxiv.org/abs/cond-mat/0701787
dc.identifierhttp://arxiv.org/abs/cond-mat/0701787
dc.identifierPhysical Review B, {\bf 75}, 125434 (2007)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/127027
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleElementary Electronic Excitations in Graphene Nanoribbons
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