Serpentine superlattice quantum-wire arrays of (Al,Ga)As grown on vicinal GaAs substrates

M. S. Miller, H. Weman, C. E. Pryor, M. Krishnamurthy, P. M. Petroff, H. Kroemer, and J. L. Merz
Phys. Rev. Lett. 68, 3464 – Published 8 June 1992
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Abstract

A serpentine superlattice quantum-wire array avoids the tilt sensitivity of a tilted superlattice and promises significant 1D confinement at the 10 nm scale. Transmission electron micrographs confirm the intended geometry. Three independent polarization measurements, an energy shift, and the light-hole–heavy-hole splitting at 1.4 K, when compared with theory demonstrate 1D valence band states and 2D conduction band states. All five measurements are explained by lateral AlxGa1xAs wells and barriers of x=0.12 and 0.21, respectively, thus characterizing the step-flow growth.

  • Received 7 February 1992

DOI:https://doi.org/10.1103/PhysRevLett.68.3464

©1992 American Physical Society

Authors & Affiliations

M. S. Miller, H. Weman, C. E. Pryor, M. Krishnamurthy, P. M. Petroff, H. Kroemer, and J. L. Merz

  • Department of Electrical and Computer Engineering, University of California–Santa Barbara, Santa Barbara, California 93106
  • Center for Quantized Electronic Structures, University of California–Santa Barbara, Santa Barbara, California 93106
  • Department of Physics, University of California–Santa Barbara, Santa Barbara, California 93106
  • Engineering Materials Department, University of California–Santa Barbara, Santa Barbara, California 93106

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Issue

Vol. 68, Iss. 23 — 8 June 1992

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