Abstract
The surface impedance Z(s)=R-s+iX(s) of a number of Sr2RuO4 crystals has been measured in the frequency range f similar to 2-15 GHz using a dielectric resonator technique. Z(s) conforms to the classical skin effect only above 20 K, because the quasiparticle relaxation rate 1/tau approaches 2 pi f at lower temperatures. Below T-c, R-s decreases while X-s initially increases and peaks at a frequency-dependent temperature. The microwave properties are quite unlike those of conventional and high-T-c superconductors and imply a finite quasiparticle fraction at T=0 with a temperature-independent relaxation time throughout the superconducting state.
Original language | English |
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Pages (from-to) | 092504 |
Number of pages | 1 |
Journal | Physical Review B |
Volume | 74 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1 Sept 2006 |