Phys. Rev. B 62, 12985–12989 (2000)Spin-dependent resonances in the conduction edge of quantum wiresReceived 15 October 1999; revised 24 March 2000; published in the issue dated 15 November 2000 The conductance through a quantum wire of cylindrical cross section and a weak bulge is determined exactly for two electrons within the Landauer-Büttiker 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. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.62.12985
DOI:
10.1103/PhysRevB.62.12985
PACS:
73.23.Hk, 72.10.-d, 73.23.Ad, 85.30.Vw
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