Glasslike low-frequency ac response of ZrB12 and Nb single crystals in the surface superconducting state
Menachem I. Tsindlekht, Grigory I. Leviev, Valery M. Genkin, Israel Felner, Yurii B. Paderno, Vladimir B. Filippov
DOI 10.1103/PhysRevB.73.104507 · Physical Review B
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Abstract
We report experimental studies of the low-frequency electrodynamics of ZrB12 and Nb single crystals. The ac susceptibility at frequencies 3–1000Hz has been measured under a dc magnetic field H0 applied parallel to the sample surface. In the surface superconducting state for several H0 the real part of the ac magnetic susceptibility exhibits a logarithmic frequency dependence as for spin-glass systems. Kramers-Kronig analysis of the experimental data shows large losses at ultralow frequencies (<3Hz). The wave function slope at the surface was found. The linear response of the order parameter to the ac excitation was extracted from the experimental data.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| ZrB12 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.06 | Pressure not reported | unknown |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.2 | Pressure not reported | unknown |
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