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

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

1997-05-20

arxiv.org/abs/cond-mat/9705196v1

Physics

Condensed Matter

Strongly Correlated Electrons

16 pages of revtex, 12 figures

Scientific paper

10.1103/PhysRevB.56.11001

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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