Weak scattering sources in YBa$_{2}$Cu$_{3}$O$_{6.5}$

ORAL

Abstract

We have measured the microwave conductivity of ultra-high purity single crystal YBa$_{2}$Cu$_{3}$O$_{6.5}$ as a continuous function of frequency (0.5 to 20 GHz) and at low temperatures. The samples were prepared in the highly ordered ortho-II phase, in which the off-plane oxygen atoms are arranged into alternating full and empty chains. Measurements were taken in this ordered state and then, following heating and rapid quench cooling, again in a disordered state. Our results help to illuminate the roles of both cation impurities and of CuO chain oxygen disorder as sources of in-plane quasi-particle scattering in ultra-high purity YBCO.

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Authors

  • James Day

    University of Alberta, University of British Columbia

  • Jordan Baglo

    University of British Columbia

  • Jake Bobowski

    University of British Columbia

  • Shun Chi

    University of British Columbia

  • Pinder Dosanjh

    University of British Columbia

  • Rinat Ofer

    University of British Columbia, University of British Colombia

  • Brad Ramshaw

    University of British Columbia

  • Lynne Semple

    University of British Columbia

  • Ruixing Liang

    University of British Columbia, Physics and Astronomy department, University of British Columbia, 2355 East Mall, V6R 1Z4 Vancouver, Canada.

  • Walter Hardy

    University of British Columbia, Physics and Astronomy department, University of British Columbia, 2355 East Mall, V6R 1Z4 Vancouver, Canada.

  • D. Bonn

    University of British Columbia, Physics and Astronomy department, University of British Columbia, 2355 East Mall, V6R 1Z4 Vancouver, Canada.