Intrinsic Flux-Flow Resistance Steps in the Cuprate Superconductor Nd2−xCexCuOy
O. M. Stoll, S. Kaiser, R. P. Huebener, M. Naito
DOI 10.1103/PhysRevLett.81.2994 · Physical Review Letters
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Abstract
We have observed a novel intrinsic step structure in the flux-flow resistance of epitaxial c-axis-oriented films of Nd2−xCexCuOy as a function of current at intermediate magnetic fields Bc1≪B<Bc2. The effect is observed only if the sample is cooled with superfluid helium. For explaining the underlying instability, we propose a model based on the strongly energy-dependent density of states available near the Fermi energy for quasiparticle scattering in the superconducting mixed state for the clean limit.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nd2-xCexCuOy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21.3 | Pressure not reported | unknown |
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