Microwave spectroscopy of thermally excited quasiparticles in YBa2Cu3O6.99
Abstract
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.
- Publication:
-
Physical Review B
- Pub Date:
- July 1999
- DOI:
- arXiv:
- arXiv:cond-mat/9811041
- Bibcode:
- 1999PhRvB..60.1349H
- Keywords:
-
- 74.25.Nf;
- 74.25.Fy;
- Response to electromagnetic fields;
- Transport properties;
- Condensed Matter - Superconductivity;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 13 pages with 10 figures. submitted to Phys Rev B