Far-infrared resonance in Sr(2)RuO(4).
The far-infrared c-axis reflectance of Sr(2)RuO(4) has been measured above and below the 2.5 K superconducting transition temperature of the sample. A plasma edge develops near 70 cm(-1) as the temperature is lowered, which corresponds to a Drude peak in the real optical conductivity associated with the onset of the coherent motion of the carriers. A gaplike suppression of the frequency-dependent scattering rate at low temperatures indicates that the coherent transport is related to a loss of scattering below 60 cm(-1). A strong resonance near 9 meV is responsible for the scattering that destroys coherence.
Hildebrand
M G
MG
Department of Physics, Brock University, St. Catharines, Ontario, Canada L2S 3A1.
Reedyk
M
M
Katsufuji
T
T
Tokura
Y
Y