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Title: Variational localized-site cluster expansions. X. Dimerization in linear Heisenberg chains
Author: Klein, D. J.
García Bach, Ma. de los Ángeles
Keywords: Magnetisme
València (Química)
Valence (Theoretical chemistry)
Issue Date: 1979
Publisher: The American Physical Society
Abstract: Ground-state instability to bond alternation in long linear chains is considered from the point of view of valence-bond (VB) theory. This instability is viewed as the consequence of a long-range order (LRO) which is expected if the ground state is reasonably described in terms of the Kekulé states (with nearest-neighbor singlet pairing). It is argued that the bond alternation and associated LRO predicted by this simple, VB picture is retained for certain linear Heisenberg models; many-body VB calculations on spin s=1 / 2 and s=1 chains are carried out in a test of this argument.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1979, vol. 19, núm. 2, p. 877-886.
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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