Universal doping dependence of the ground-state staggered magnetization of cuprate superconductors
Rinat Ofer, Amit Keren, Omar Chmaissem, Alex Amato
DOI 10.1103/PhysRevB.78.140508 · Physical Review B
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Abstract
Using muon spin rotation we determine the zero-temperature staggered antiferromagnetic order parameter M0 versus hole doping measured from optimum Δpm, in the (CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy system. In this system the maximum Tc and the superexchange J vary by 30% between families (x). M0(x,Δpm) 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,Δpm) to the kinetic-energy variations in the framework of the t−J model.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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