Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1997-05-20
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 $CuGeO_3$.
Delfino Gesulado
Essler Fabian H. L.
Tsvelik Alexei M.
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