Dynamical Dzyaloshinsky-Moriya Interaction in KCuF3

M. V. Eremin; D. V. Zakharov; H. -A. Krug von Nidda; R. M. Eremina; A. Shuvaev; A. Pimenov; P. Ghigna; J. Deisenhofer; A. Loidl

doi:10.1103/PhysRevLett.101.147601

Dynamical Dzyaloshinsky-Moriya Interaction in KCuF3

Strongly Correlated Electrons 2009-11-13 v1 Materials Science

Authors: M. V. Eremin , D. V. Zakharov , H. -A. Krug von Nidda , R. M. Eremina , A. Shuvaev , A. Pimenov , P. Ghigna , J. Deisenhofer , A. Loidl

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Abstract

The spin dynamics of the prototypical quasi one-dimensional antiferromagnetic Heisenberg spin S=1/2 chain KCuF3 is investigated by electron spin resonance spectroscopy. Our analysis shows that the peculiarities of the spin dynamics require a new dynamical form of the antisymmetric anisotropic spin-spin interaction. This dynamical Dzyaloshinsky-Moriya interaction is related to strong oscillations of the bridging fuorine ions perpendicular to the crystallographic c axis. This new mechanism allows to resolve consistently the controversies in observation of the magnetic and structural properties of this orbitally ordered perovskite compound.

Keywords

dzyaloshinskii-moriya interaction magnetism frustrated magnetism

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@article{arxiv.0807.3641,
  title  = {Dynamical Dzyaloshinsky-Moriya Interaction in KCuF3},
  author = {M. V. Eremin and D. V. Zakharov and H. -A. Krug von Nidda and R. M. Eremina and A. Shuvaev and A. Pimenov and P. Ghigna and J. Deisenhofer and A. Loidl},
  journal= {arXiv preprint arXiv:0807.3641},
  year   = {2009}
}

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4 pages, 3 figures

Dynamical Dzyaloshinsky-Moriya Interaction in KCuF3

Abstract

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