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Correlation functions in one-dimensional spin lattices with Ising and Heisenberg bonds

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  • Stefano Bellucci
  • Vadim Ohanyan

Abstract

A general technique of exact calculation of any correlation functions for the special class of one-dimensional spin models containing small clusters of quantum spins assembled to a chain by alternating with the single Ising spins is proposed. The technique is a natural generalization of that in the models solved by a classical transfer matrix. The general expressions for corresponding matrix operators which are the key components of the technique are obtained. As it is clear from the general principles, the decay of the correlation functions of various types is explicitly shown to be governed by a single correlation length. The technique is illustrated by two examples: symmetric diamond chain and asymmetric sawtooth chain. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Suggested Citation

  • Stefano Bellucci & Vadim Ohanyan, 2013. "Correlation functions in one-dimensional spin lattices with Ising and Heisenberg bonds," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 86(11), pages 1-12, November.
    • Handle: RePEc:spr:eurphb:v:86:y:2013:i:11:p:1-12:10.1140/epjb/e2013-40336-4
    DOI: 10.1140/epjb/e2013-40336-4
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    Solid State and Materials;

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