Symmetry breaking and nonlinear electrodynamics in the ceramic superconductor YBa2Cu3O7
Carson Jeffries, Q. Harry Lam, Youngtae Kim, L. C. Bourne, A. Zettl
DOI 10.1103/PhysRevB.37.9840 · Physical Review B
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Abstract
For bulk samples of the ceramic superconductor YBa2Cu3O7 in a radio-frequency magnetic field and in a dc magnetic field H0 we observe novel nonlinear behavior including very-high-order odd-harmonic generation if H0=0. If H0≠0, there is additional even-harmonic generation. The even-harmonic power displays a very sharp dip at H0∼0, of width Å 100 μG. This and related behavior can be semiquantitatively understood by modeling the system as a suitably averaged collection of flux-quantized supercurrent loops containing Josephson junctions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88.5 | Pressure not reported | unknown |
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