Dynamical Structure Factors for the Heisenberg Chain with Alternating Exchange

Details Dynamical Structure Factors for the Heisenberg Chain with Alternating Exchange Dynamical Structure Factors for the Heisenberg Chain with Alternating Exchange

2002-11-15

arxiv.org/abs/cond-mat/0211335v2

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 3 figures, corrected typos in equations (11)-(13)

Scientific paper

We discuss the transition strength between the disordered ground state and
the basic low-lying triplet excitation for the Heisenberg chain with
alternating exchange based on series expansions in the interdimer interaction
up to tenth order. We demonstrate that the wave vector dependence of the simple
dimer approximation is strongly modified in higher orders.

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