Spin-cluster states inplanes
- 1 September 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 48 (10) , 7537-7544
- https://doi.org/10.1103/physrevb.48.7537
Abstract
When doping the antiferromagnetically ordered high- cuprates with holes magnetic polarons (spin-polarized clusters) are formed. We discuss two different mean-field approaches of the three-band Hubbard model to calculate the binding energy and polarization of the clusters. At higher hole concentrations and due to cluster diffusion a phase separation is formed by establishing large fractal or percolative clusters. This percolation picture allows us to understand experimentally obtained results for phase separation as well as magnetic and conductive phase diagrams.
Keywords
This publication has 22 references indexed in Scilit:
- Magnetic resonance and magnetic ordering in the oxygen-deficient RBa2Cu3Ox superconductorsSolid State Communications, 1993
- Phase separation in La2CuO4+δ superconductors as studied by paramagnetic resonancePhysica Status Solidi (b), 1992
- Percolative phase separation in La2CuO4+? and La2?x Sr x CuO4Zeitschrift für Physik B Condensed Matter, 1992
- Magnetic interactions and dynamics of holes inplanes of high-superconducting materialsPhysical Review B, 1991
- NMR study of phase separation in single-crystalPhysical Review B, 1990
- Mean-field theories of the two-band model and the magnetism in high-oxidesPhysical Review B, 1989
- The crystal structure of superconducting La2CuO4.032 by neutron diffractionPhysica C: Superconductivity and its Applications, 1989
- Superconducting phase of: A superconducting composition resulting from phase separationPhysical Review B, 1988
- High-Tc superconductivity induced by ferromagnetic clusteringPhysica C: Superconductivity and its Applications, 1988
- Theory of high-superconductivity in oxidesPhysical Review Letters, 1987