Unusual low-frequency electromagnetic response in anisotropic superconductors: Application to UPt3
W. O. Putikka, P. J. Hirschfeld, P. Wölfle
DOI 10.1103/PhysRevB.41.7285 · Physical Review B
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Abstract
We calculate the electromagnetic response of an anisotropic superconductor, and show that the temperature dependence of the magnetic penetration depth is strongly suppressed by an ac field even for frequencies very small compared to the gap magnitude. The effect arises as a result of virtual excitations of Bogoliubov quasiparticle-quasihole pairs in the neighborhood of the gap nodes. We propose that this phenomenon is responsible for apparent discrepancies among various recent penetration-depth experiments on superconducting UPt3. The available data are found to be consistent with a state of E1g symmetry.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UPt3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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