Glass-like low frequency ac response of ZrB${}_{12}$ and Nb single crystals in the surface superconducting state

Menachem I. Tsindlekht, Grigory I. Leviev, Valery M. Genkin +3

We report experimental studies of the low frequency electrodynamics of ZrB${}_{12}$ and Nb single crystals. AC susceptibility at frequencies 3 - 1000 Hz have been measured under a dc…