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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We report experimental studies of the low-frequency electrodynamics of ZrB12 and Nb single crystals. The ac susceptibility at frequencies 3-1000 Hz 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 (<3 Hz). 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.

Original languageEnglish
Article number104507
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number10
DOIs
StatePublished - 2006

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