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arXiv · 0806.2201

Parity Violation in a Single Domain of Spin-Triplet Sr2RuO4 Superconductors

H. Nobukane·K. Inagaki·K. Ichimura·K. Yamaya·S. Takayanagi·I. Kawasaki·K. Tenya·H. Amitsuka·K. Konno·Y. Asano·S. Tanda
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Abstract

We observed an unconventional parity-violating vortex in single domain Sr2RuO4 single crystals using a transport measurement. The current-voltage characteristics of submicron Sr2RuO4 shows that the induced voltage has anomalous components which are even function of the bias current. The results may suggest that the vortex itself has a helical internal structure characterized by a Hopf invariant (a topological invariant). We also discuss that the hydrodynamics of such a helical vortex causes the parity violation to retain the topological invariant.

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H. Nobukane, K. Inagaki, K. Ichimura, K. Yamaya, S. Takayanagi, I. Kawasaki, K. Tenya, H. Amitsuka, K. Konno, Y. Asano, S. Tanda. 2009-04-27. Parity Violation in a Single Domain of Spin-Triplet Sr2RuO4 Superconductors. https://doi.org/10.1016/j.ssc.2009.04.022

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