Dimensionality and subband effects on hot-carrier transport in two- and one-dimensional electron systems

X. F. Wang and X. L. Lei
Phys. Rev. B 47, 16612 – Published 15 June 1993
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Abstract

The effects of lateral confinement on hot-electron transport in GaAs-based quasi-two-dimensional (quantum slab) and quasi-one-dimensional (quantum wire) systems are investigated systematically, taking into account 21 subbands in the quantum wires and 7 subbands in the quantum slabs. Linear and high-field mobilities due to acoustic- and optic-phonon scatterings are examined as functions of lateral confinement. The energy relaxation of heated electron gases is analyzed in terms of electron bulk density and electron temperature. Dimensionality and subband effects manifest themselves as oscillations in these transport properties. Crossover and trends from one-, two-, and three-dimensional behavior are clearly seen when electrons populate several subbands.

  • Received 16 December 1992

DOI:https://doi.org/10.1103/PhysRevB.47.16612

©1993 American Physical Society

Authors & Affiliations

X. F. Wang

  • Shanghai Institute of Metallurgy, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China

X. L. Lei

  • China Center of Advanced Science and Technology (World Laboratory), P.O. Box 8730, Beijing 100080, China
  • Shanghai Institute of Metallurgy, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China

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Vol. 47, Iss. 24 — 15 June 1993

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