Zero-conductance resonances and spin-filtering effects in ring conductors subject to Rashba coupling

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dc.creatorCitro, R.
dc.creatorRomeo, F.
dc.creatorMarinaro, M.
dc.date2006-12-21
dc.date.accessioned2026-07-07T07:36:32Z
dc.date.available2026-07-07T07:36:32Z
dc.descriptionWe investigate the effect of Rashba spin-orbit coupling and of a tunnel barrier on the zero conduc- tance resonances appearing in a one-dimensional conducting Aharonov-Bohm (AB) ring symmet- rically coupled to two leads. The transmission function of the corresponding one-electron problem is derived within the scattering matrix approach and analyzed in the complex energy plane with focus on the role of the tunnel barrier strength on the zero-pole structure characteristic of trans- mission (anti)resonances. The lifting of the real conductance zeros is related to the breaking of the spin-reversal symmetry and time-reversal symmetry of Aharonov-Casher (AC)and AB rings, as well as to rotational symmetry breaking in presence of a tunnel barrier. We show that the polarization direction of transmitted electrons can be controlled via the tunnel barrier strength and discuss a novel spin-filtering design in one-dimensional rings with tunable spin-orbit interaction.
dc.description13 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0612560
dc.identifierhttp://arxiv.org/abs/cond-mat/0612560
dc.identifierPhys. Rev. B 74, 115329 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.115329
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/120458
dc.subjectMesoscale and Nanoscale Physics
dc.titleZero-conductance resonances and spin-filtering effects in ring conductors subject to Rashba coupling
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