Skip to main content
SpringerLink
Log in

An Analysis of Evidence for Superconducting Energy Gap and Pairing Interaction Anisotropy for Two Types of Experiments

  • Chapter
Book cover Anisotropy Effects in Superconductors

Abstract

While there is a large body of evidence that the pairing interaction and energy gap in superconductors are anisotropic, there is also some inconsistency in many of the measurements of these quantities /1,2/. In this paper we would like to review and critique the results of two kinds of experiments, that we have performed over the last decade /3/, to measure possible anisotropy of the energy gap and pairing interaction in superconducting systems. These two techniques are (a) measurement of the shift in critical temperature due to removal of anisotropy by boundary scattering in single crystals or in well annealed polycrystalline foils, and (b) measurement of the energy gap via tunneling into single crystals of gallium.

Work supported in part by NSF and ERDA.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 39.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 54.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. A comprehensive review of the evidence for anisotropy of the superconducting energy gap is given by A.G. Sheplev, Soviet Phys. Usp. 11, 690 (1969). Also see Ref. /2,3a,3f/

    Article  Google Scholar 

  2. J.L. Bostock, M.L.A. MacVicar, paper R-6, this volume, p. 213

    Google Scholar 

  3. Over the last decade a number of experimental papers on anisotropy have been published by the Low Temperature Group at Georgetown University. Theses, when unpublished, are available from Dissertation Copies, P.O.B. 1764, Ann Arbor, Michigan 48106 a W.D. Gregory, Ph.D.Thesis, MIT 1966 (unpublished); W.D.Gregory, T.P.Sheahen, J.F.Cochran, Phys.Rev. 150, 315 (1966) b W.D. Gregory, L.S. Straus, R.F. Averill, J.C.Keister, C.Chapman Low Temp. Phys. LT 13, vol.3, p. 316 (Ed. Timmerhaus and Hammel, Plenum Publ.Corp.) 1972 c W.D. Gregory, Phys.Rev.Lett. 20, 53 (1968) d W.D. Gregory, M.A. Superata, P.J. Carroll, Phys.Rev. B3, 85 (1971) e W.D. Gregory, M.A. Superata, J.Cryst.Growth 7, 5 (1970) f S.B. Horn, Ph.D. Thesis, Georgetown University 1974 (unpublished) g J.C. Keister, L.S. Straus, W.D. Gregory, J.Appl.Phys. 42, 642 (1971) h R.F. Averill, L.S. Straus, W.D. Gregory, Appl.Phys.Lett. 20, 55 (1972) i W.D. Gregory, R.F. Averill, L.S. Straus, Phys.Rev.Lett. 27, 1503 (1971) j A. Grekas, Ph.D. Thesis, Georgetown University 1976 (unpublished)

    Google Scholar 

  4. D. Markowitz, L.P. Kadanoff, Phys.Rev. 131, 563 (1963)

    Article  CAS  Google Scholar 

  5. J. Clem, Annals of Phys. 40, 268 (1966)

    Article  CAS  Google Scholar 

  6. E.A. Lynton, D. McLachlan, Phys.Rev. 126, 40 (1962)

    Article  CAS  Google Scholar 

  7. For example, see R. Oder, Ph.D. Thesis, MIT 1964 (unpublished)

    Google Scholar 

  8. S.B. Horn, W.D. Gregory, to be published (see also Ref. /3f/)

    Google Scholar 

  9. D.K.C. Mac Donald, Phil.Mag. 2, 97 (1957)

    Article  Google Scholar 

  10. K. Fuchs, Proc.Cambridge Phil.Soc. 34, 100 (1938)

    Article  CAS  Google Scholar 

  11. N.V. Zavaritskii, Soviet Phys. JETP 18, 1260 (1964)

    Google Scholar 

  12. W.D. Sheril, H.E. Edwards, Phys.Rev.Lett. 6, 460 (1961). See also I.Dietrich, Z.Naturforsch. 17a, 94 (1962) and I. Dietrich, Proc. VIII Internat. Conf. Low Temp. Phys., London (1963), p. 173

    Article  Google Scholar 

  13. M.L.A. MacVicar, R.M. Rose, J.Appl.Phys. 39, 1721 (1968). See also M.L.A.MacVicar, R.M. Rose, Phys.Lett. 25A, 681 (1967)

    Article  CAS  Google Scholar 

  14. B.L. Blackford, R.H. March, Phys.Rev. 186, 387 (1969)

    Article  Google Scholar 

  15. W.D. Gregory, L.S. Straus, R.F. Averill, J.C. Keister, C. Chapman, Low Temp. Phys.LT13, vol.3, p.316 (Ed. Timmerhaus and Hammel, Plenum Pub/. Corp.) 1972. See also B.C. Blackford, Dalhousie University, to be published (1975)

    Google Scholar 

  16. R.F. Averill, L.S. Straus, W.D. Gregory, Appl.Phys.Lett. 20, 55 (1972). See also Ref. /3b/

    Article  CAS  Google Scholar 

  17. See Ref. /3b,3g,3i/. See also K. Yoshihiro, W. Sasaki, J.Phys. Soc.Japan 24, 426 (1968), K.Yoshihiro, W.Sasaki, J.Phys. Soc.Japan 28, 262 (1970), J.J. Polick, Ph.D. Thesis, Ohio State University 1973 (unpublished)

    Article  CAS  Google Scholar 

  18. S. Shapiro, P.M. Smith, J. Nicol, J.L. Miles, P.F. Strong, IBM J. Res.Develop. 6, 34 (1962)

    Article  CAS  Google Scholar 

  19. P.R. Benington, “Data Reduction and Error Analysis for the Physical Sciences”, McGraw-Hill, New York 1969

    Google Scholar 

  20. N.C. Cirillo,Jr., W.L. Clinton, paper C-15, this volume, p.283

    Google Scholar 

  21. I. Wu, W.L. Clinton, to be published

    Google Scholar 

  22. J.E. Dowman, M.L.A. MacVicar, R.J. Waldram, Phys.Rev. 186, 452 (1969)

    Article  Google Scholar 

  23. R. Janik, L. Horelli, N.C. Cirillo,Jr., J.N. Lechevet, W.D. Gregory, W.L. Goodman, IEEE Transactions on Magnetics, Mag. 11, 687 (1975). See also W.D. Gregory, L. Morelli, Bull.Am.Phys.Soc. 21, 403 (1976)

    Article  Google Scholar 

  24. D.U. Gubser, Phys.Rev. B6, 827 (1972).

    Google Scholar 

Download references

Author information

Author notes

  1. A. J. Grekas

    Present address: Physics Department, City College of New York, New York, USA

  2. S. Horn

    Present address: Night Vision Laboratory, Fort Belvoir, Virginia, USA

Authors and Affiliations

  1. Department of Physics, Georgetown University, Washington, D.C., 20057, USA

    W. D. Gregory, A. J. Grekas, S. Horn & L. Morelli

Authors
  1. W. D. Gregory
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. J. Grekas
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. S. Horn
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. L. Morelli
    View author publications

    You can also search for this author in PubMed Google Scholar

Editor information

Editors and Affiliations

  1. Atomic Institute of the Austrian Universities, Vienna, Austria

    Harald W. Weber

Rights and permissions

Reprints and permissions

Copyright information

© 1977 Plenum Press, New York

About this chapter

Cite this chapter

Gregory, W.D., Grekas, A.J., Horn, S., Morelli, L. (1977). An Analysis of Evidence for Superconducting Energy Gap and Pairing Interaction Anisotropy for Two Types of Experiments. In: Weber, H.W. (eds) Anisotropy Effects in Superconductors. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-0781-5_20

Download citation

  • DOI: https://doi.org/10.1007/978-1-4684-0781-5_20

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-0783-9

  • Online ISBN: 978-1-4684-0781-5

  • eBook Packages: Springer Book Archive

Publish with us

Policies and ethics

Search

Navigation