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- W1987888514 abstract "Using the coupled-cluster method we investigate the ground-state properties of an easy-plane spin-one antiferromagnet which has a critical point at zero temperature. This spin system represents a nontrivial system with the single-ion anisotropy. Single-ion anisotropies have a fundamental influence on the behavior of a magnetic system, and prevail in almost all physical systems with spin greater than one half. Because of the complexities caused by the single-ion anisotropy term, the mean-field approximation is commonly used in calculations of the thermodynamic quantities. However, in the mean-field approximation both quantum and spin fluctuation correlations have been neglected. Here we apply the coupled-cluster method to obtain the ground-state energy, staggered magnetization and critical point for both two and three dimensional lattices. In the coupled-cluster method the correlations of the quantum and spin fluctuations have been systematically included." @default.
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- W1987888514 date "1993-05-15" @default.
- W1987888514 modified "2023-09-26" @default.
- W1987888514 title "Ground-state properties for an easy-plane spin-one antiferromagnet— The coupled-cluster method (abstract)" @default.
- W1987888514 doi "https://doi.org/10.1063/1.352716" @default.
- W1987888514 hasPublicationYear "1993" @default.
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