Journal of Low Temperature Physics

, Volume 26, Issue 1–2, pp 101–110 | Cite as

Superconducting energy gap in semiconducting GeTe

  • J. L. Smith
  • P. J. Stiles
Article

Abstract

Tunneling measurements were made on thin films (700–1400 Å) of GeTe to determine the dependence of the superconducting energy gap on carrier concentration. Temperatures as low as ∼25 mK were used and perpendicular magnetic fields were applied to measure the critical fields. The energy gap Δ was found to vary from 30 to 42 µeV for carrier concentrations from 1.5 to 2.4 × 1021 / cm3.

Keywords

Magnetic Field Thin Film Magnetic Material Carrier Concentration GeTe 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    M. L. Cohen,Phys. Rev. 134, A511 (1964).Google Scholar
  2. 2.
    R. A. Hein, J. W. Gibson, R. Mazelsky, R. C. Miller, and J. K. Hulm,Phys. Rev. Lett. 12, 320 (1964).Google Scholar
  3. 3.
    P. J. Stiles, L. Esaki, and J. F. Schooley,Phys. Lett. 23, 206 (1966).Google Scholar
  4. 4.
    G. Binnig and H. E. Hoenig,Solid State Comm. 14, 597 (1974).Google Scholar
  5. 5.
    L. Esaki and P. J. Stiles,Phys. Rev. Lett. 16, 1108 (1966).Google Scholar
  6. 6.
    J. Bardeen, L. N. Cooper, and J. R. Shreiffer,Phys. Rev. 108, 1175 (1957); S. Bermon, National Science Foundation Grant No. NSF-GP1100 Technical Report No. 1 (1964), unpublished.Google Scholar
  7. 7.
    J. K. Hulm, C. K. Jones, R. Mazelsky, R. C. Miller, R. A. Hein, and J. W. Gibson, inProc. of the 9th Int. Conf. on Low Temp. Physics, J. G. Daunt, D. O. Edwards, F. J. Milford, and M. Yaqub, eds. (Plenum Press, New York, 1965), p. 600.Google Scholar
  8. 8.
    M. L. Cohen,Superconductivity, R. D. Parks, ed. (Marcel Dekker, New York, 1969), Chapter 12.Google Scholar

Copyright information

© Plenum Publishing Corporation 1977

Authors and Affiliations

  • J. L. Smith
    • 1
  • P. J. Stiles
    • 1
  1. 1.Physics DepartmentBrown UniversityProvidence

Personalised recommendations