Elsevier

Surface Science

Volume 305, Issues 1–3, 20 March 1994, Pages 480-489
Surface Science

Conductance fluctuations in a quantum dot in the tunneling regime: Crossover from aperiodic to regular behavior

https://doi.org/10.1016/0039-6028(94)90940-7Get rights and content

Abstract

We discuss magnetoconductance fluctuations in a ∼ 1 microm GaAS/AlxGa1−xAs quantum dot in the shape of a chaotic stadium billiard with point contact leads. Here we emphasize measurements carried out in the tunneling regime, where each lead carries less than one fully conducting channel. We discuss various crossover phenomena as the magnetoconductance fluctuations evolve from aperiodic structure at low fields (B ≲ 0.5 T) into periodic, Aharonov-Bohm-like oscillations at higher fields.

References (27)

  • C.H. Lewenkopf et al.

    Ann. Phys.

    (1991)
  • B.J. van Wees

    Phys. Rev. Lett.

    (1989)
  • I.P. Kouwenhoven

    Phys. Rev. B

    (1989)
  • P.L. McEuen

    Phys. Rev. Lett.

    (1991)
  • P.L. McEuen

    Phys Rev. B

    (1992)
  • C.M. Marcus et al.

    Phys. Rev. Lett.

    (1992)
  • B.W. Alphenaar

    Phys. Rev. B

    (1992)
  • R.P. Taylor et al.

    Phys. Rev. Lett

    (1992)
  • A.T. Johnson et al.

    Phys. Rev. Lett.

    (1992)
  • B.L. Altshuler

    JETP Lett.

    (1985)
  • R.A. Jalabert et al.

    Phys. Rev. Lett.

    (1992)
  • N. Argaman et al.

    Phys. Rev. B

    (1993)
  • B.L. Altshuler et al.

    Sov. Phys. JETP

    (1986)
  • Cited by (45)

    • Spin splitting of Aharonov-Bohm oscillations in a small quantum dot

      1999, Physica E: Low-Dimensional Systems and Nanostructures
    • Phase breaking of trapped electrons in a gated quantum dot

      1997, Superlattices and Microstructures
    View all citing articles on Scopus
    1

    Present address: Department of Physics, Stanford University. Stanford CA 94305-4060, USA.

    View full text