Quantum blockade and loop current induced by a single lattice defect in graphene nanoribbons

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dc.creatorYan, Jie-Yun
dc.creatorZhang, Ping
dc.creatorSun, Bo
dc.creatorLu, Hai-Zhou
dc.creatorWang, Zhigang
dc.creatorDuan, Suqing
dc.creatorZhao, Xian-Geng
dc.date2008-10-28
dc.date2009-03-05
dc.date.accessioned2026-07-07T12:48:52Z
dc.date.available2026-07-07T12:48:52Z
dc.descriptionWe investigate theoretically the electronic transport properties in narrow graphene ribbons with an adatom-induced defect. It is found that the lowest conductance step of a metallic graphene nanoribbon may develop a dip even down to zero at certain values of the Fermi energy due to the defect. Accompanying the occurrence of the conductance dip, a loop current develops around the defect. We show how the properties of the conductance dip depend on the parameters of the defect, such as the relative position and severity of the defect as well as the width and edges of the graphene ribbons. In particular, for metallic armchair-edges graphene nanoribbons, whether the conductance dip appears or not, they can be controlled by choosing the position of the single defect.
dc.description6 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0810.4966
dc.identifierhttp://arxiv.org/abs/0810.4966
dc.identifierdoi:10.1103/PhysRevB.79.115403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/222209
dc.subjectMesoscale and Nanoscale Physics
dc.titleQuantum blockade and loop current induced by a single lattice defect in graphene nanoribbons
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