Rash spin-orbit interaction in graphene and graphene zigzag nano-ribbons

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dc.creatorZarea, Mahdi
dc.creatorSandler, Nancy
dc.date2009-01-01
dc.date2009-05-08
dc.date.accessioned2026-07-07T13:12:28Z
dc.date.available2026-07-07T13:12:28Z
dc.descriptionWe investigate the effects of Rashba spin-orbit interactions on the electronic band-structure and corresponding wave-functions of graphene. By exactly solving a tight-binding model Hamiltonian we obtain the expected splitting of the bands -due to the SU(2) spin symmetry breaking- that is accompanied by the appearance of additional Dirac points. These points are originated by valence-conduction band crossings. By introducing a convenient gauge transformation we study a model for zigzag nanoribbons with RSO interactions. We show that the RSO interactions lifts the quasi-degeneracy of the edge band while introducing a state-dependent spin separation in real space. Calculation of the average magnetization perpendicular to the ribbon plane suggest that RSO could be used to produce spin-polarized currents. Comparisons with the intrinsic spin-orbit (I-SO) interaction proposed to exist in graphene are also presented.
dc.descriptionminor changes, 10 figures
dc.identifierhttps://arxiv.org/abs/0901.0160
dc.identifierhttp://arxiv.org/abs/0901.0160
dc.identifierPhys. Rev. B 79, 165442 (2009)
dc.identifierdoi:10.1103/Phy.Rev.B.79.165442
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229588
dc.subjectMesoscale and Nanoscale Physics
dc.titleRash spin-orbit interaction in graphene and graphene zigzag nano-ribbons
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