Precision measurements of the temperature dependence of λ in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>6.95</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>: Strong evidence for nodes in the gap function

19931,092 citationsJournal Article

Authors

W. N. Hardy · University of British Columbia

D. A. Bonn · University of British Columbia

D. C. Morgan · University of British Columbia

Ruixing Liang · University of British Columbia

Kuan Zhang · University of British Columbia

Abstract

A miniature superconducting resonator operating at 1.3 K and 900 MHz has been used to measure the change in \ensuremath{\lambda}(T) from 1.3 K to ${\mathit{T}}_{\mathit{c}}$ in very high quality single crystals of ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{6.95}$. The data, which have a resolution of 1-2 \AA{}, show a strong linear term extending from approximately 3 to 25 K. We believe the strong linear dependence to be characteristic of the pure system and that its apparent absence in thin films and some crystals is due to the presence of defects.

Topics & Keywords

Physics of Superconductivity and Magnetism Advanced Condensed Matter Physics Superconducting Materials and Applications

Publication Details

Published in: Physical Review Letters

Volume 70, Issue 25, pp. 3999-4002

DOI: 10.1103/physrevlett.70.3999

Field-Weighted Citation Impact: 72.27

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