Abstract
There is growing evidence that the superconductivity in recently discovered Sr 2RuO 4 is isotropic p-wave. However, the definitive experiment which reveals the p-wave symmetry appears to be still lacking. Here we report some properties of the vortex state in a magnetic field parallel to the a– b plane. As is well known, the order parameter takes a simple form Δ( k)∝ cos(θ−φ) for 0.45 H c2 <H<H c2 where θ and φ are the angle H and k makes from the a-axis. This θ-dependence of Δ( k) can be detected by STM and the thermal conductivity tensor.
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