Thermal conductivity of superconducting Sr2RuO4 in oriented magnetic fields
M. A. Tanatar, S. Nagai, Z. Q. Mao, Y. Maeno, T. Ishiguro
DOI 10.1103/PhysRevB.63.064505 · Physical Review B
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Abstract
We report in-plane thermal conductivity along [100] direction, κ100, of high quality single crystals (Tc=1.44 K) of unconventional superconductor Sr2RuO4. Measurements were performed as a function of temperature T and magnetic fields H of various orientations. Linear decrease of κ100/T in T in zero field is found below 1 K, in contrast to nearly constant value in the normal state. Field dependence of κ100/T at 0.3 K in H perpendicular to the plane is qualitatively similar to that for a line-node superconducting state in the low temperature limit. The dependence gives μ0Hc1≈8 mT and μ0Hc2≈60 mT. In the in-plane fields, the field dependence at low temperatures shows a notable difference from the perpendicular field case. The temperature and field domain of this anomalous behavior is consistent with the existence of another superconducting phase, as proposed recently.
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. | 1.44 | Pressure not reported | unknown |
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