Ultrasound Attenuation in Sr2RuO4: An Angle-Resolved Study of the Superconducting Gap Function
C. Lupien, W. A. MacFarlane, Cyril Proust, Louis Taillefer, Z. Q. Mao, Y. Maeno
DOI 10.1103/PhysRevLett.86.5986 · Physical Review Letters
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Abstract
We present a study of the electronic ultrasound attenuation α in the unconventional superconductor Sr2RuO4. The power law behavior of α at temperatures down to Tc/30 clearly indicates the presence of nodes in the gap. In the normal state, we find an enormous anisotropy of α in the basal plane of the tetragonal structure. In the superconducting state, the temperature dependence of α also exhibits significant anisotropy. We discuss these results in relation to possible gap functions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.37 | Pressure unresolved | onset |
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