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- W2094354279 abstract "The plaquette expansion of the Lanczos recursion method is applied to the two-dimensional antiferromagnetic Heisenberg model. Connected Hamiltonian moments 〈${mathit{H}}^{mathit{n}}$${mathrm{〉}}_{mathit{c}}$ are calculated with respect to the N'eel state up to n=6. The subsequent plaquette expansion of the Lanczos matrix in the number of plaquettes on the lattice, ${mathit{N}}_{mathit{p}}$, is determined to order 1/${mathit{N}}_{mathit{p}}$. Diagonalizing the Lanczos matrix in this form gives a value of the energy density of -0.664 in the limit ${mathit{N}}_{mathit{p}}$ensuremath{rightarrow}ensuremath{infty}, in good agreement with existing calculations." @default.
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- W2094354279 date "1994-07-01" @default.
- W2094354279 modified "2023-09-26" @default.
- W2094354279 title "Plaquette expansion of the two-dimensional antiferromagnetic Heisenberg model" @default.
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- W2094354279 doi "https://doi.org/10.1103/physrevb.50.1275" @default.
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