Electrodynamic response of Sr2Ru04
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Colleges, School and Institutes
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.
|Number of pages||1|
|Journal||Physical Review B|
|Publication status||Published - 1 Sep 2006|