Doping dependence of Meissner effect in cuprate superconductors

Abstract

Within the t-t'-J model, the doping dependence of the Meissner effect in cuprate superconductors is studied based on the kinetic energy driven superconducting mechanism. Following the linear response theory, it is shown that the electromagnetic response consists of two parts, the diamagnetic current and the paramagnetic current, which exactly cancels the diamagnetic term in the normal state, and then the Meissner effect is obtained for all the temperature $T\le T_c$ throughout the superconducting dome. By considering the two-dimensional geometry of cuprate superconductors within the specular reflection model, the main features of the doping and temperature dependence of the local magnetic field profile, the magnetic field penetration depth, and the superfluid density observed on cuprate superconductors are well reproduced. In particular, it is shown that in analogy to the domelike shape of the doping dependent superconducting transition temperature, the maximal superfluid density occurs around the critical doping $\delta \approx 0.195$, and then decreases in both lower doped and higher doped regimes.

13 pages, 5 figures

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• Electronic structure of cuprate superconductors in a full charge-spin recombination scheme
• Magnetic field induced reduction of the low-temperature superfluid density in cuprate superconductors
• Electronic Raman response in electron-doped cuprate superconductors
• Why there is a difference between optimal doping for maximal Tc and critical doping for highest ρ_s in cuprate superconductors?
• Doping dependence of electromagnetic response in cuprate superconductors
• Doping dependence of Meissner effect in triangular-lattice superconductors
• Pseudogap and its connection to particle-hole asymmetry electronic state and Fermi arcs in cuprate superconductors
• Doping dependence of electromagnetic response in electron-doped cuprate superconductors