1999/10/25 by Tomaž Rejec, T. Rejec, A. Ramšak +2 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Graphene research and applications #Quantum and electron transport phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.62.12985
published as Phys. Rev. B 62, (2000) 12985 · 5 pages, 3 postscript files with figures; uses REVTeX
arxiv created 1999/10/25 · openalex publication_date 2000/11/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The conductance through a quantum wire of cylindrical cross section and a weak bulge is determined exactly for two electrons within the Landauer-B"uttiker formalism. We show that this ``open'' quantum dot exhibits spin-dependent resonances resulting in two anomalous structure on the rising edge to the first conductance plateau, one near 0.25(2e2/h), related to a singlet resonance, and one near 0.7(2e2/h), related to a triplet resonance. These resonances are generic and robust, occurring for other types of quantum wires and surviving to temperatures of a few degrees.