Magnetotransport along a quantum wire

H. C. Tso and P. Vasilopoulos
Phys. Rev. B 44, 12952 – Published 15 December 1991
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Abstract

Electrical transport is considered along a quantum wire in the presence of a perpendicular magnetic field at very low temperatures. The lateral confinement is assumed to be parabolic and the vertical one triangular. Impurity scattering (screened) and electron-electron interaction are treated self-consistently within the random-phase approximation. The current response is evaluated from the derived momentum-balance equation, which involves the nonequilibrium electron polarizability, in conjunction with a drifted-temperature model for the polarizability. The conductivity exhibits Shubnikov–de Haas oscillations. The degree of asymmetry of the latter, with respect to the peak position, and the shift of the peak relative to the corresponding one in the Fermi level, depend on the strength of the lateral confinement and on the temperature. The screening affects the amplitude of the conductivity but not the shape of the oscillations.

  • Received 28 February 1991

DOI:https://doi.org/10.1103/PhysRevB.44.12952

©1991 American Physical Society

Authors & Affiliations

H. C. Tso and P. Vasilopoulos

  • Department of Physics, Concordia University, 1455 de Maisonneuve Boulevard West, Montréal, Québec, Canada H3G 1M8

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Issue

Vol. 44, Iss. 23 — 15 December 1991

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