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Journal of Low Temperature Physics

, Volume 99, Issue 3–4, pp 359–361 | Cite as

Quantum fluctuations in structurally disordered antiferrromagnets

  • K. Retzlaff
  • J. Richter
Magnetism

Abstract

We present exact diagonalisation data for the ground state of finite two-dimensional spin 1/2 Heisenberg antiferromagnets with structural disorder. The combination of antiferromagnetic coupling and structural disorder creates frustation and a local singlet formation which may strongly influence the magnetic ordering. In detail we study the magnetic radial distribution function, the magnetic order parameter M2 as well as a parameter measuring the spin misfit and present these quantities in dependence on the strength of the structural disorder. We estimate the critical disorder where the antiferromagnetic long-range order breaks down.

PACS numbers

75.10.Jm 75.50.Ee 71.55.Jv 

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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • K. Retzlaff
    • 1
  • J. Richter
    • 1
  1. 1.Institute for Theoretical PhysicsUniversity MagdeburgGermany

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