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

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

2008-06-13

arxiv.org/abs/0806.2201v3

Solid State Communications 149 (2009) 1212-1215

Physics

Condensed Matter

Superconductivity

Accepted for publication in Solid State Communications

Scientific paper

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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