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Czechoslovak Journal of Physics

, Volume 46, Supplement 2, pp 657–658 | Cite as

Investigation of Nb contacts to a GaInAs/InP heterostructure

  • D. Uhlisch
  • A. A. Golubov
  • M. Hollfelder
  • K. Neurohr
  • A. V. Ustinov
  • A. I. Braginski
  • H. Lüth
LTSC—Tunnelling Phenomena, Layered Structures, Weak Links, Proximity Effects
  • 14 Downloads

Abstract

Lateral contacts between a high-mobility 2-dimensional electron gas (2DEG) and superconducting Nb have been prepared by etching down the heterostructure and depositing Nb on the mesa from the side. A second kind of contact has been achieved by depositing the Nb on top of the heterostructure contacting the 2DEG through a 60 nm thick barrier of Ga0.47In0.53As. Both kinds of contacts show a pronounced nonlinearity in the differential resistance due to the superconducting energy gap. The I-U characteristics of the different contact configurations are compared and discussed in terms of the interplay between Andreev and ordinary reflection processes at both kinds of Nb-2DEG interfaces.

Keywords

Lateral Contact Specific Contact Resistance Metal Organic Vapour Phase Epitaxy Contact Configuration Thick Barrier 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. [1]
    G. E. Blonder, M. Tinkham and T. M. Klapwijk; Phys. Rev. B25, 4515 (1982).CrossRefADSGoogle Scholar
  2. [2]
    K. Neurohr, A. A. Golubov, et al.; to be published.Google Scholar
  3. [3]
    A. F. Volkov, A. V. Zaitsev and T. M. Klapwijk; Physica C210, 21 (1993).CrossRefGoogle Scholar

Copyright information

© Institute of Physics, Acad. Sci. CR 1996

Authors and Affiliations

  • D. Uhlisch
    • 1
  • A. A. Golubov
    • 2
  • M. Hollfelder
    • 1
  • K. Neurohr
    • 1
  • A. V. Ustinov
    • 1
  • A. I. Braginski
    • 1
  • H. Lüth
    • 1
  1. 1.Institute of Thin Film and Ion Technology (ISI)Research Centre Jülich (KFA)JülichGermany
  2. 2.Institute of Solid State PhysicsChernogolovkaRussia

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