Observation of vortex coalescence in the anisotropic spin-triplet superconductor Sr$_{2}$RuO$_{4}$

C. Veauvy; D. Mailly; F. Servant; K. Hasselbach; P. Lejay; V. O. Dolocan; Y. Liu

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Observation of vortex coalescence in the anisotropic spin-triplet superconductor Sr$_{2}$RuO$_{4}$

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arxiv cond-mat/0406195 v1 pith:NPZG5XSK submitted 2004-06-08 cond-mat.supr-con

V. O. Dolocan , C. Veauvy , Y. Liu , F. Servant , P. Lejay , D. Mailly , K. Hasselbach This is my paper

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keywords fluxanisotropicdomainsfieldsmagneticspin-tripletsuperconductorvortices

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abstract

We present direct imaging of magnetic flux structures in the anisotropic, spin-triplet superconductor Sr$_{2}$RuO$_{4}$ using a scanning $\mu$SQUID microscope. Individual quantized vortices were seen at low magnetic fields. Coalescing vortices forming flux domains were revealed at intermediate fields. Based on our observations we suggest that a mechanism intrinsic to the material stabilizes the flux domains against the repulsive vortex-vortex interaction. Topological defects like domain walls can provide this, implying proof for unconventional chiral superconductivity.

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