Effect of uniaxial stress on the superconducting transition in YBa2Cu3O7

U. Welp, M. Grimsditch, S. Fleshler, W. Nessler, J. Downey, G. W. Crabtree, and J. Guimpel
Phys. Rev. Lett. 69, 2130 – Published 5 October 1992
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Abstract

We present the first direct measurements of Tc as a function of uniaxial stress pi (i=a,b,c) along the crystal axes for an untwinned YBa2Cu3O7δ single crystal. Tc is linear in pi with slopes dTc/dpa=-2.0±0.2 K/GPa, dTc/dpb=+1.9±0.2 K/GPa, and dTc/dpc=-0.3±0.1 K/GPa. These results confirm predictions based on thermal expansion measurements [C. Meingast et al., Phys. Rev. Lett. 67, 1634 (1991)] and show that the small hydrostatic pressure dependence of Tc in YBa2Cu3O7δ is due to a cancellation of large and opposite effects in the a-b plane.

  • Received 3 June 1992

DOI:https://doi.org/10.1103/PhysRevLett.69.2130

©1992 American Physical Society

Authors & Affiliations

U. Welp, M. Grimsditch, S. Fleshler, W. Nessler, J. Downey, and G. W. Crabtree

  • Materials Science Division and Science and Technology Center for Superconductivity, Argonne National Laboratory, Argonne, Illinois 60439

J. Guimpel

  • Department of Physics, University of California, La Jolla, California 92093

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Vol. 69, Iss. 14 — 5 October 1992

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