Microwave Conductivity of YBa$_2$Cu$_3$O$_{6.5}$ in the Low Temperature Limit

ORAL

Abstract

With adaptation for dilution refrigerator operation, the unique capabilities of bolometric microwave spectroscopy have been introduced to the millikelvin temperature regime. Using this technique we have measured the microwave conductivity of ultra-high purity Ortho-II YBa$_2$Cu$_3$O$_{6.5}$ down to below 100 mK, over a continuous frequency range from 0.5 to 20 GHz. The resulting spectra are analyzed in the context of a phenomenological lineshape model for the quasiparticle conductivity. The evolution of the spectra from the low temperature limit sheds new light on the low-energy charge dynamics of YBa$_2$Cu$_3$O$_{6.5}$.

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Authors

  • Jordan Baglo

    University of British Colombia, University of British Columbia

  • James Day

    University of British Colombia, University of British Columbia

  • Jake Bobowski

    University of British Colombia, University of British Columbia

  • Shun Chi

    University of British Colombia, University of British Columbia

  • Pinder Dosanjh

    University of British Colombia, University of British Columbia

  • Rinat Ofer

    University of British Columbia, University of British Colombia

  • Brad Ramshaw

    University of British Columbia, University of British Colombia

  • Lynne Semple

    University of British Columbia

  • Ruixing Liang

    University of British Columbia, University of British Colombia

  • Walter Hardy

    University of British Colombia, University of British Columbia

  • Doug Bonn

    University of British Columbia, University of British Colombia