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Quasi-1D spin-1/2 Heisenberg magnets in their ordered phase: correlation functions

Fabian H. L. Essler·Alexei M. Tsvelik·Gesulado Delfino
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Abstract

We study weakly coupled antiferromagnetic spin chains in their ordered phase by combinining an exact solution of the single-chain problem with an RPA analysis of the interchain interaction. A single chain is described by a quantum Sine-Gordon model and dynamical staggered susceptibilities are determined by employing the formfactor approach to quantum correlation functions. We consider both antiferromagnetic order encountered in quasi-1D materials like $KCuF_3$ and spin-Peierls order as found in $CuGeO_3$.

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Fabian H. L. Essler, Alexei M. Tsvelik, Gesulado Delfino. 1997-05-20. Quasi-1D spin-1/2 Heisenberg magnets in their ordered phase: correlation functions. https://doi.org/10.1103/physrevb.56.11001

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