Finite Temperature Dynamical Structure Factor of Alternating Heisenberg Chains

Details Finite Temperature Dynamical Structure Factor of Alternating Heisenberg Chains Finite Temperature Dynamical Structure Factor of Alternating Heisenberg Chains

2008-10-05

arxiv.org/abs/0810.0828v2

Phys. Rev. B 78, 094411 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 4 eps-figures

Scientific paper

10.1103/PhysRevB.78.094411

We develop a low-temperature expansion for the finite temperature dynamical
structure factor of the spin half Heisenberg chain with alternating nearest
neighbour exchange in the limit of strong alternation of the exchange
constants. We determine both the broadening of the low lying triplet lines and
the contribution of the thermally activated intraband scattering.

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