Observation of vortex coalescence in the anisotropic spin-triplet superconductor Sr2RuO4.
We present direct imaging of magnetic flux structures over the ab face of the anisotropic, spin-triplet superconductor Sr2RuO4 using a scanning microSQUID force microscope. Individual vortices with a single flux quantum were observed at low magnetic fields applied along the out-of-pane direction. At intermediate fields, the direct imaging revealed coalescing of vortices and the formation of flux domains. Our observations imply the existence of a mechanism in this material for bringing vortices together overcoming the conventional repulsive vortex-vortex interaction.
Dolocan
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CRTBT-CNRS, 25 Avenue des Martyrs, 38042 Grenoble, France.
Veauvy
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Servant
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Lejay
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Hasselbach
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Liu
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Mailly
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