Abstract
The surface impedance Zs = Rs +i Xs of a number of Sr2 RuO4 crystals has been measured in the frequency range f∼2-15 GHz using a dielectric resonator technique. Zs conforms to the classical skin effect only above 20 K, because the quasiparticle relaxation rate 1 τ approaches 2πf at lower temperatures. Below Tc, Rs decreases while Xs initially increases and peaks at a frequency-dependent temperature. The microwave properties are quite unlike those of conventional and high- Tc superconductors and imply a finite quasiparticle fraction at T=0 with a temperature-independent relaxation time throughout the superconducting state.
Original language | English (US) |
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Article number | 092504 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 74 |
Issue number | 9 |
DOIs | |
State | Published - 2006 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics