Phys. Rev. B 64, 073305 (2001) [4 pages]Temperature-dependent suppression of conductance in quantum wires: Anomalous activation energy from pinning of the band edgeReceived 4 April 2001; published 26 July 2001 For unpolarized electrons in a clean quantum wire, density functional theory reveals a thermally activated suppression of conductance. The activation temperature TA grows slowly (roughly quadratically) with gate voltage due to pinning of the band edge at the chemical potential. Similar results were obtained experimentally by Kristensen et al. [Phys. Rev. B 62, 10 950 (2000)] for the temperature dependence of the anomalous conductance plateau near 0.7(2e2/h) in a quantum point contact. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.64.073305
DOI:
10.1103/PhysRevB.64.073305
PACS:
73.61.-r, 71.15.Mb, 71.70.Ej
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