Magnetic force microscopy study of interlayer kinks in individual vortices in the underdoped cuprate superconductor YBa2Cu3O6+x
Lan Luan, Ophir M. Auslaender, Douglas A. Bonn, Ruixing Liang, Walter N. Hardy, Kathryn A. Moler
DOI 10.1103/PhysRevB.79.214530 · Physical Review B
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Abstract
We use magnetic force microscopy to both image and manipulate individual vortex lines threading single crystalline YBa2Cu3O6.4, a layered superconductor. We find that when we pull the top of a pinned vortex, it may not tilt smoothly. Occasionally, we observe a vortex to break into discrete segments that can be described as short stacks of pancake vortices, similar to the “kinked” structure proposed by Benkraouda and Clem. Quantitative analysis gives an estimate of the pinning force and the coupling between the stacks. Our measurements highlight the discrete nature of stacks of pancake vortices in layered superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21 | Pressure not reported | unknown |
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