Criticality of theD=2quantum Heisenberg ferromagnet with quenched random anisotropy
- 1 June 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 31 (11) , 7491-7493
- https://doi.org/10.1103/physrevb.31.7491
Abstract
We consider the square-lattice spin-(1/2) anisotropic Heisenberg ferromagnet with interactions whose symmetry can independently (quenched model) and randomly be of two competing types: namely, the isotropic Heisenberg type and the Ising type. Within a real-space renormalization-group framework, we perform a quite precise numerical calculation of the critical frontier, and establish its main asymptotic behaviors. We also characterize the relevant universality classes through the analysis of the correlation-length critical exponent.Keywords
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