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A numerical study of the formation of magnetisation plateaus in quasi one-dimensional spin-1/2 Heisenberg models

  • R.M. Wießner
  • A. Fledderjohann
  • K.-H. Mütter
  • M. Karbach
Article

Abstract:

We study the magnetisation process of the one-dimensional spin-1/2 antiferromagnetic Heisenberg model with modulated couplings over j=1,2,3sites. It turns out that the evolution of magnetisation plateaus depends on j and on the wave number q of the modulation according to the rule of Oshikawa et al. A mapping of two- and three-leg zig-zag ladders on one-dimensional systems with modulated couplings yields predictions for the occurrence of magnetization plateaus. The latter are tested by numerical computations with the DMRG algorithm.

PACS. 75.10.-b General theory and models of magnetic ordering - 75.10.Jm Quantized spin models - 75.45.+j Macroscopic quantum phenomena in magnetic systems 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • R.M. Wießner
    • 1
  • A. Fledderjohann
    • 1
  • K.-H. Mütter
    • 1
  • M. Karbach
    • 1
  1. 1.Physics DepartmentUniversity of WuppertalWuppertalGermany

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