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- W2000421823 abstract "The projector Monte Carlo method and finite-size scaling are applied to the solution of the ground-state properties of the ``Kondo necklace'' Hamiltonian. The energy and various spin-spin correlation functions are calculated for chains up to 16 sites in length. Correlations between the spins on different sites are evaluated, and the nature of the ground-state phase as a function of the ratio of the exchange coupling J to the bandwidth W is examined. Evaluation of the correlation function 〈Sensuremath{rightarrow}(i)ensuremath{cdot}ensuremath{tau}ensuremath{rightarrow}(i)〉 shows that as the coupling between the localized S spins and the ensuremath{tau} spin chain increases, the system becomes composed of independent singlets on each site. Contrary to both mean-field and various approximate renormalization-group calculations, we find that our results are consistent with an absence of magnetic order as soon as J is different from 0." @default.
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- W2000421823 date "1985-06-01" @default.
- W2000421823 modified "2023-09-25" @default.
- W2000421823 title "Monte Carlo simulation of the ‘‘Kondo necklace’’" @default.
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- W2000421823 doi "https://doi.org/10.1103/physrevb.31.7316" @default.
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