Conductance Quantization in a Periodically Modulated Quantum Channel: backscattering and mode mixing

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dc.creatorDeo, P. Singha
dc.creatorGupta, B. C.
dc.creatorJayannavar, A. M.
dc.creatorPeeters, F. M.
dc.date1997-09-25
dc.date.accessioned2026-07-07T09:12:14Z
dc.date.available2026-07-07T09:12:14Z
dc.descriptionIt is known that the conductance of a quantum point contact is quantized in units of $2e^2/h$ and this quantization is destroyed by a non-adiabatic scatterer in the point contact, due to backscattering. Recently, it was shown [Phys. Rev. Lett. 71, 137 (1993)] that taking many non-adiabatic scatterers periodically in a quantum channel, the quantization can be recovered. We study this conductance quantization of a periodic system in the presence of a strong defect. A periodic arrangement of double-stubs give remarkable quantization of conductance. A periodic arrangement of double-constrictions also gives a very good quantization only when the separation between the constrictions is small. We conclude that conductance quantization of a periodically modulated channel is robust.
dc.descriptionRevtex file, postscript figures attached
dc.identifierhttps://arxiv.org/abs/cond-mat/9709276
dc.identifierhttp://arxiv.org/abs/cond-mat/9709276
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/151952
dc.subjectMesoscale and Nanoscale Physics
dc.titleConductance Quantization in a Periodically Modulated Quantum Channel: backscattering and mode mixing
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