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

Abstract

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 magnetic field, $H_0$, applied parallel to the sample surface. In the surface superconducting state, for several $H_0$, 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 ultra low 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.

arXiv comment9 pages, 12 figures

References in corpus (6)

• Surface Superconductivity in Niobium for Superconducting RF Cavities
• Tunneling and Magnetic Characteristics of Superconducting ZrB${}_{12}$ Single Crystals
• Surface Contribution to the Superconducting Properties of MgB2 Single Crystals
• The low-frequency response in the surface superconducting state of ZrB${}_{12}$ single crystal}
• Voltage noise and surface current fluctuations in the superconducting surface sheath
• Surface Induced Anomalous Superconductivity

Cited by in corpus (8)

• Type-I superconductivity in ScGa3 and LuGa3 single crystals
• Linear and nonlinear low frequency electrodynamics of the surface superconducting states in an yttrium hexaboride a single crystal
• Paramagnetic Meissner effect in ZrB12 single crystal with non-monotonic vortex-vortex interactions
• Anisotropy of the upper critical fields and the paramagnetic Meissner effect in La1.85Sr0.15CuO4 single Crystals
• Inhomogeneous superconductivity in LuxZr1-xB12 dodecaborides with dynamic charge stripes
• Anisotropic superconductivity in ZrB${}_{12}$ near critical Bogomolnyi point
• Vortex-glass transformation within the surface superconducting state of $\beta$-phase Mo${}_{1-x}$Re${}_x$ alloys
• Surface superconducting states in a polycrystalline MgB${}_2$ sample