de Haas-van Alphen study in the superconducting state of YNi2B2C
G. Goll, M. Heinecke, A. G. M. Jansen, W. Joss, L. Nguyen, E. Steep, K. Winzer, P. Wyder
DOI 10.1103/PhysRevB.53.R8871 · Physical Review B
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Abstract
In the borocarbide superconductor YNi2B2C the de Haas-van Alphen (dHvA) oscillations have been observed continuously at the upper critical field Bc2 for the transition from the normal into the superconducting state. In the normal state above Bc2=10.5 T six different frequencies were found in magnetic fields up to 23 T and for Θ=14.4°. The smallest orbit with Fα=511 T is present down to about 4 T, but with an additional attenuation of the dHvA signal in the superconducting state relative to an extrapolation of the standard Lifshitz-Kosevich formula. The observation of magnetoquantum oscillations over such a wide field range and very close to Bc2 enables a detailed discussion of the damping in the context of recent theories of these oscillations in the superconducting state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.7 | Pressure not reported | onset |
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