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Phys. Rev. B 38, 909–912 (1988)

Systematic variation of magnetic-field penetration depth in high-Tc superconductors studied by muon-spin relaxation

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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

Received 10 February 1988; revised 18 April 1988; published in the issue dated 1 July 1988

The muon-spin relaxation rate σ has been measured in the high-Tc superconductors YBa2Cu3Ox for x=6.66, 6.95, 7.0, and La1.85Sr0.15CuO4 in transverse external magnetic fields ∼1-4 kG. We find a simple relation which connects the transition temperature Tc, the magnetic-field penetration depth λL, the carrier concentration ns, and the effective mass m* as Tc∝σ∝1/λL2∝ns/m*. The linear dependence Tc∝ns/m* suggests a high-energy scale for the coupling between superconducting carriers.

© 1988 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.38.909
DOI:
10.1103/PhysRevB.38.909
PACS:

*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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