corner
corner
APS » Journals » Phys. Rev. B » Volume 60 » Issue 2
< Previous Article | Next Article >

Phys. Rev. B 60, 1349–1359 (1999)

Microwave spectroscopy of thermally excited quasiparticles in YBa2Cu3O6.99

Download: PDF (384 kB) Buy this article Export: BibTeX or EndNote (RIS)

A. Hosseini, R. Harris, Saeid Kamal, P. Dosanjh, J. Preston*, Ruixing Liang, W. N. Hardy, and D. A. Bonn
Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia, Canada V6T 1Z1

Received 3 November 1998; revised 29 January 1999; published in the issue dated 1 July 1999

We present here the microwave surface impedance of a high-purity crystal of YBa2Cu3O6.99 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 Tc and the very weak impurity scattering in the high-purity BaZrO3-grown crystal used in this study. Above 20 K, the scattering increases dramatically, initially at least as fast as T4.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.60.1349
DOI:
10.1103/PhysRevB.60.1349
PACS:
74.25.Nf, 74.25.Fy

*Permanent address: Dept. of Physics and Astronomy, McMaster University, 1080 Main St. W, Hamilton, ON, Canada, L8S 4M1.

 
< Previous Article | Next Article >