Vortex avalanches in the non-centrosymmetric superconductor Li2Pt3B

Abstract

We investigated the vortex dynamics in the non-centrosymmetric superconductor Li_2Pt_3B in the temperature range 0.1 K - 2.8 K. Two different logarithmic creep regimes in the decay of the remanent magnetization from the Bean critical state have been observed. In the first regime, the creep rate is extraordinarily small, indicating the existence of a new, very effective pinning mechanism. At a certain time a vortex avalanche occurs that increases the logarithmic creep rate by a factor of about 5 to 10 depending on the temperature. This may indicate that certain barriers against flux motion are present and they can be opened under increased pressure exerted by the vortices. A possible mechanism based on the barrier effect of twin boundaries is briefly discussed.

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• Extreme vortex pinning in the non-centrosymmetric superconductor CePt${}_3$Si
• Proximity-induced equilibrium supercurrent and perfect superconducting diode effect due to band asymmetry
• Superconducting properties of the noncentrosymmetric superconductor TaOs
• Persistence of Metastable Vortex Lattice Domains in MgB2 in the Presence of Vortex Motion
• Absence of spin-orbit-coupling-induced effects on lattice dynamics in CePt3Si
• Superconductivity in W3Re2C with chiral structure