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29 March 2024
 
  » arxiv » cond-mat/9810113

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Low-Energy Structure of Heisenberg Ferrimagnetic Spin Chains
Shoji Yamamoto ; Toru Sakai ;
Date 9 Oct 1998
Subject Statistical Mechanics | cond-mat.stat-mech
AbstractStatic and dynamic structure factors of Heisenberg ferrimagnetic spin chains are numerically investigated. There exist two distinct branches of elementary excitations, which exhibit ferromagnetic and antiferromagnetic aspects. The ferromagnetic feature is smeared out with the increase of temperature, whereas the antiferromagnetic one persists up to higher temperatures. The scattering intensity is remarkably large at lower boundaries of the ferromagnetic and antiferromagnetic spectra. All these observations are consistent with the ferromagnetic-to-antiferromagnetic crossover in the thermal behavior which has recently been reported.
Source arXiv, cond-mat/9810113
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