Microwave spectroscopy of thermally excited quasiparticles in ${YBa}_{2} {Cu}_{3} O_{6.99}$

1 July 1999

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 60 (2) , 1349-1359
https://doi.org/10.1103/physrevb.60.1349

Abstract

We present here the microwave surface impedance of a high-purity crystal of

{YBa}_{2} {Cu}_{3} O_{6.99}

measured at five frequencies between 1 and 75 GHz. This data set reveals the main features of the conductivity spectrum of the thermally excited quasiparticles in the superconducting state. Below 20 K there is a regime of extremely long quasiparticle scattering times, due to both the collapse of inelastic scattering below

T_{c}

and the very weak impurity scattering in the high-purity

{BaZrO}_{3}

-grown crystal used in this study. Above 20 K, the scattering increases dramatically, initially at least as fast as

T^{4}

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Version 1, 1998-11-03, ArXiv

This publication has 51 references indexed in Scilit:

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Microwave spectroscopy of thermally excited quasiparticles inYBa2Cu3O6.99

Abstract

Keywords

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Microwave spectroscopy of thermally excited quasiparticles in ${YBa}_{2} {Cu}_{3} O_{6.99}$