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arxiv: cond-mat/9910399 · v1 · submitted 1999-10-25 · ❄️ cond-mat.mes-hall

Coulomb Blockade Resonances in Quantum Wires

T. Rejec (1) , A. Ramsak (1 , 2) , J. H. Jefferson (3) ((1) J. Stefan Institute , Ljubljana , Slovenia , (2) Faculty of Mathematics , Physics
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University of Ljubljana (3) DERA Electronic Sector Great Malvern England)
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classification ❄️ cond-mat.mes-hall
keywords quantumresonancesblockadeconductancecoulombnearrelatedresonance
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The conductance through a quantum wire of cylindrical cross section and a weak bulge is solved exactly for two electrons within the Landauer-Buettiker formalism. We show that this 'open' quantum dot exhibits spin-dependent Coulomb blockade resonances resulting in two anomalous structure on the rising edge to the first conductance plateau, one near 0.25(2e^2/h), related to a singlet resonance, and one near 0.7(2e^2/h), related to a triplet resonance. These resonances are generic and robust, occurring for other types of quantum wire and surviving to temperatures of a few degrees.

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