Observation of Splintered Josephson Vortices at Grain Boundaries in YBa2Cu3O7−δ
R. G. Mints, Ilya Papiashvili, J. R. Kirtley, H. Hilgenkamp, G. Hammerl, J. Mannhart
DOI 10.1103/PhysRevLett.89.067004 · Physical Review Letters
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Abstract
We have directly observed well-separated Josephson vortex splinters with unquantized magnetic flux at asymmetric 45° grain boundaries in YBa2Cu3O7−δ films by imaging magnetic flux with scanning SQUID microscopy. The existence of these splinter vortices has been predicted and is well described by a model based on dx2−y2 pairing symmetry and facetting of the grain boundary on a length scale shorter than the Josephson penetration depth.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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