Peak effect in a superconductor/normal metal strip being in vortex-free state

Abstract

We theoretically predict that the critical current $I_c$ and magnetization $M$ of hybrid superconductor/normal-metal (SN) strip may have nonmonotonous dependence on perpendicular magnetic field - so called peak effect. In contrast to familiar peak effect, which is connected either with vortex entry to the superconductor or with peculiarities of vortex pinning, the found phenomenon exists at low fields, in the vortex-free (Meissner) phase. We argue that the effect appears at specific parameters of studied hybrid structure when its in-plane current-supervelocity relation has two maxima. We expect that the same peak effect may exist in two-band superconductors (like MgB${}_2$) where similar current-supervelocity dependence was predicted at low temperatures.

arXiv comment5 pages, 3 figures

References in corpus (10)

• Where does the transport current flow in Bi2Sr2CaCu2O8 crystals?
• Characterization of thin-film NbN superconductor for single-photon detection by transport measurements
• Why magnesium diboride is not described by anisotropic Ginzburg-Landau theory
• Peak Effect, Fishtail Effect and Plateau Effect : The Reentrant Amorphization of Vortex Matter in 2H-NbSe_2
• Thermodynamic origin of the peak effect in the superconductor Nb3Sn
• Dynamic ordering of driven vortex matter in the peak effect regime of amorphous MoGe films and 2H-NbSe2 crystals
• Field-Dependent Critical Current in Type-II Superconducting Strips: Combined Effect of Bulk Pinning and Geometrical Edge Barrier
• The pair-breaking critical current density of magnesium diboride
• Vortex-induced negative magnetoresistance and peak effect in narrow superconducting films
• Theory of the critical current in two-band superconductors with application to MgB2