Abstract
We measured the low-temperature specific heat and de Haas–van Alphen oscillation in Sr 2RuO 4. The electronic specific heat C e follows a T 2-dependence below 0.7 K for the sample with a superconducting critical temperature T c=1.52 K, suggesting line nodes in the superconducting gap. Three kinds of cylindrical Fermi surfaces were discussed from a view point of their cyclotron effective masses.
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