Doping dependence of the critical current in Bi2Sr2CaCu2Oy

Abstract

The doping dependence of the critical current density, $J_c$, was measured in a series of high quality c-axis oriented $\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{r}}_2\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_{8+\delta }$ thin films. For each doping level we measured the temperature dependence of $J_c$. We find that all samples have the same temperature dependence, but the critical current at zero temperature, $J_c(0)$, has a non-trivial doping dependence with a maximum at a unique doping level in the overdoped side of the superconducting dome.

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• Peak in the critical current density in (Ca${}_x$Sr${}_{1-x}$)${}_3$Rh${}_4$Sn${}_{13}$ tuned towards the structural quantum critical point
• The High Temperature Superconductivity in Cuprates: Physics of the Pseudogap Region
• Simultaneous drop in mean free path and carrier density at the pseudogap onset in high-$T_c$ cuprates
• Quantum Phase Transition as a Promising Route to Enhance the Critical Current in Kagome Superconductor CsV${}_3$Sb${}_5$
• Boost of critical current density near quantum critical points in FeSe-Based superconductors with two superconducting domes