Systematic variation of magnetic-field penetration depth in high-<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span> superconductors studied by muon-spin relaxation

Y. J. Uemura; V. J. Emery; A. R. Moodenbaugh; M. Suenaga; D. C. Johnston; A. J. Jacobson; J. T. Lewandowski; J. H. Brewer; R. F. Kiefl; S. R. Kreitzman; G. M. Luke; T. Riseman; C. E. Stronach; W. J. Kossler; J. R. Kempton; X. H. Yu; D. Opie; H. E. Schone

doi:10.1103/PhysRevB.38.909

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Systematic variation of magnetic-field penetration depth in high- $T_{c}$ superconductors studied by muon-spin relaxation

Y. J. Uemura, V. J. Emery, A. R. Moodenbaugh, M. Suenaga, D. C. Johnston, A. J. Jacobson, J. T. Lewandowski, J. H. Brewer, R. F. Kiefl, S. R. Kreitzman, G. M. Luke, T. Riseman, C. E. Stronach, W. J. Kossler, J. R. Kempton, X. H. Yu, D. Opie, and H. E. Schone

Phys. Rev. B 38, 909(R) – Published 1 July 1988

Abstract

The muon-spin relaxation rate $σ$ has been measured in the high- $T_{c}$ superconductors $Y {Ba}_{2} {Cu}_{3} O_{x}$ for $x = 6.66, 6.95, 7.0$ , and ${La}_{1.85}$ ${Sr}_{0.15}$ Cu $O_{4}$ in transverse external magnetic fields ∼1-4 kG. We find a simple relation which connects the transition temperature $T_{c}$ , the magnetic-field penetration depth $λ_{L}$ , the carrier concentration $n_{s}$ , and the effective mass $m^{*}$ as $T_{c} \propto σ \propto \frac{1}{λ_{L}^{2}} \propto \frac{n_{s}}{m^{*}}$ . The linear dependence $T_{c} \propto \frac{n_{s}}{m^{*}}$ suggests a high-energy scale for the coupling between superconducting carriers.

Received 10 February 1988

DOI:https://doi.org/10.1103/PhysRevB.38.909

Authors & Affiliations

Y. J. Uemura, V. J. Emery, A. R. Moodenbaugh, and M. Suenaga

Brookhaven National Laboratory, Upton, New York 11973

D. C. Johnston^*, A. J. Jacobson, and J. T. Lewandowski

Corporate Research Laboratories, Exxon Research and Engineering Company, Annandale, New Jersey 08801

J. H. Brewer, R. F. Kiefl, S. R. Kreitzman, G. M. Luke, and T. Riseman

TRIUMF and Department of Physics, University of British Columbia, Vancouver, British Columbia, Canada V6T2A3

C. E. Stronach

Virginia State University, Petersburg, Virginia 23803

W. J. Kossler, J. R. Kempton^†, X. H. Yu, D. Opie, and H. E. Schone

College of William and Mary, Williamsburg, Virginia 23185

^*Present address: Department of Physics and Ames Laboratory, (U.S. Department of Energy), Iowa State University, Ames, IA 50011.
^†Present address: TRIUMF, University of British Columbia, Vancouver, British Columbia, Canada V6T2A3.

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Vol. 38, Iss. 1 — 1 July 1988

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