Universal doping dependence of the ground-state staggered magnetization of cuprate superconductors

Ofer, Rinat; Keren, Amit; Chmaissem, Omar; Amato, Alex

doi:10.1103/PhysRevB.78.140508

Universal doping dependence of the ground-state staggered magnetization of cuprate superconductors

Ofer R, Keren A, Chmaissem O & Amato A

Citation

Ofer, R., Keren, A., Chmaissem, O., & Amato, A. (2008). Universal doping dependence of the ground-state staggered magnetization of cuprate superconductors. Physical Review B, 78(14), 140508(R) (4 pp.). https://doi.org/10.1103/PhysRevB.78.140508

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:19088

Using muon spin rotation we determine the zero-temperature staggered antiferromagnetic order parameter M0 versus hole doping measured from optimum Δp_m, in the (Ca_xLa_1−x)(Ba_1.75−xLa_0.25+x)Cu₃O_y system. In this system the maximum T_c and the superexchange J vary by 30% between families (x). M₀(x,Δp_m) is found to be x independent. Using neutron diffraction we also determine the lattice parameters variations for all x and doping. The oxygen buckling angle is found to change with x, implying a change in the holes kinetic energy. We discuss the surprising insensitivity of M₀(x,Δp_m) to the kinetic-energy variations in the framework of the t−J model.