Journal of Low Temperature Physics

, Volume 97, Issue 1–2, pp 1–7 | Cite as

Phase coherence and tunneling between edge-states in multiple GaAs/AlxGa#x2212;x#x2212;x#x2212;xAs rings

  • J. Liu
  • W. Gao
  • K. Ismail
  • K. Lee
  • J. Hong
  • S. Washburn
Rapid Communication

Abstract

In a GaAs/AlGaAs 4-coupled-ring sample, large Aharonov-Bohm (AB) oscillations were studied up to harmonic order n = 8 for magnetic fields 0 < B < 4.5T. The frequencies of all harmonics of the AB oscillations decrease as predicted by a simple model. The results also suggest an increase of the quantum mechanical phase coherence length (lφ) with increased B.

PACS numbers

72.20.My 73.20.Dx 85.30.Tv 

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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • J. Liu
    • 1
  • W. Gao
    • 1
  • K. Ismail
    • 1
    • 2
    • 3
  • K. Lee
    • 1
    • 2
  • J. Hong
    • 1
    • 2
  • S. Washburn
    • 1
  1. 1.Department of Physics and AstronomyUniversity of North Carolina at Chapel HillChapel Hill
  2. 2.IBM T.J. Watson Research CenterYorktown
  3. 3.Dept. of Telecommunications and Elec. Eng.University of CairoCairoEgypt

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