Variational localized‐site cluster expansions. XI. Coherent state derivation of effective heisenberg hamiltonians
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A variational derivation of Heisenberg or valence‐bond models from a Hubbard (or Pariser‐Parr‐Pople) Hamiltonian is described. Calculations within a low‐order approximation are carried out for linear‐chain and graphite lattices. The results seem to be quite accurate with little computational effort when compared with other approaches. Copyright © 1983 John Wiley & Sons, Inc.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
author list (cited authors)
Klein, D. J., Seitz, W. A., Garcia‐Bach, M. A., Picone, J. M., & Foyt, D. C..
complete list of authors
KLEIN, DJ||SEITZ, WA||GARCIABACH, MA||PICONE, JM||FOYT, DC
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