We study weakly coupled antiferromagnetic spin chains in their ordered phase by combining an exact solution of the single-chain problem with a random-phase-approximation 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 form-factor approach to quantum correlation functions. We consider both antiferromagnetic order encountered in quasi-one-dimensional materials such as KCuF3 and spin-Peierls order as found in CuGeO3.
|Titolo:||Quasi 1-D spin 1/2 Heisenberg magnets in their ordered phase: Correlation functions|
|Autori:||Essler F; Tsvelik A; Delfino G|
|Rivista:||PHYSICAL REVIEW. B, CONDENSED MATTER|
|Data di pubblicazione:||1997|
|Digital Object Identifier (DOI):||10.1103/PhysRevB.56.11001|
|Appare nelle tipologie:||1.1 Journal article|