Evidence for Cooper pair diffraction on the vortex lattice of superconducting niobium
A. Maisuradze, A. Yaouanc, R. Khasanov, A. Amato, C. Baines, D. Herlach, R. Henes, P. Keppler, H. Keller
DOI 10.1103/PhysRevB.88.140509 · Physical Review B
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Abstract
We investigated the Abrikosov vortex lattice (VL) of a pure niobium single crystal with the muon spin rotation (μSR) technique. Analysis of the μSR data in the framework of the BCS-Gor'kov theory allowed us to determine microscopic parameters and the limitations of the theory. With decreasing temperature the field variation around the vortex cores deviates substantially from the predictions of the Ginzburg-Landau theory and adopts a pronounced conical shape. This is evidence of partial diffraction of Cooper pairs on the VL predicted by Delrieu for clean superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.8 | Pressure not reported | onset |
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