Muon spin rotation measurement of the fundamental length scales in the vortex state of YBa2Cu3O6.60
J.E. Sonier, J.H. Brewer, R.F. Kiefl, D.A. Bonn, S.R. Dunsiger, W.N., Hardy, Ruixing Liang, W.A. MacFarlane, R.I. Miller, T.M. Riseman, (University of British Columbia), D.R. Noakes, C.E. Stronach, M.F. White, Jr. (Virginia State University)
TL;DR
This study uses muon spin rotation to measure the magnetic penetration depth and vortex-core radius in YBa2Cu3O6.60, revealing unique temperature and magnetic field dependencies in its vortex state.
Contribution
It provides new experimental insights into the fundamental length scales in the vortex state of a high-temperature superconductor, highlighting deviations from conventional behavior.
Findings
Vortex core radius has a weaker temperature dependence than in NbSe2.
The vortex core radius decreases sharply with increasing magnetic field.
The penetration depth is significantly larger than in NbSe2.
Abstract
The internal field distribution in the vortex state of YBa2Cu3O6.60 is shown to be a sensitive measure of both the magnetic penetration depth and the vortex-core radius. The temperature dependence of the vortex core radius is found to be weaker than in the conventional superconductor NbSe2 and much weaker than theoretical predictions for an isolated vortex. The effective vortex-core radius decreases sharply with increasing H, whereas the penetration depth is found to be much stronger than in NbSe2.
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