Transport evidence for twin-boundary pinning of superconducting vortices in FeSe

Abstract

We provide bulk transport evidence for twin-boundary pinning of vortices in FeSe. We measure interlayer resistance in FeSe in magnetic fields and find that, as the field is rotated in the $ab$ plane, the flux-flow resistivity is suppressed when the field direction is parallel to twinning planes. The width of the associated dip in the resistance vs in-plane field direction curve varies as $T^{1/2}{B}^{-3/4}$, consistent with the creation of kinked vortices near the parallel field geometry.

5 pages, 6 figures

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• Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
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Cited by in corpus (1)

• Increase of critical current density in FeSe superconductor by strain effect