Direct measurement of single fluxoid dynamics in superconducting rings
Kirtley, J. R. · Tsuei, C. C. · Raffy, H. · Li, Z. Z. · Kogan, V. G. · Clem, J. R. · Moler, K. A.
Original · EN
We have measured the dynamics of individual magnetic fluxoids entering and leaving thin film, photolithographically patterned rings of underdoped high-temperature superconductor BSCCO using a variable sample temperature scanning SQUID microscope. These measurements can be understood within a phenomenological model in which the fluxoid number changes by thermal activation of a Pearl vortex in the ring wall. We place upper limits on the "vison" binding energy in these samples from these measurements.
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