Multiferroicity due to nonstoichiometry in the chain cuprate LiVCuO_4

A. S. Moskvin; S. -L. Drechsler

doi:10.1209/0295-5075/81/57004

Multiferroicity due to nonstoichiometry in the chain cuprate LiVCuO_4

Strongly Correlated Electrons 2009-11-13 v1 Materials Science

Authors: A. S. Moskvin , S. -L. Drechsler

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Abstract

The recently observed multiferroic behavior in the s=1/2 chain cuprate LiVCuO_4 (LiCuVO_4) with edge-shared CuO_4 plaquettes and helical spin ordering does not agree with the existing theories such as a spin-current scenario. We argue that the effect can be consistently explained, if the exchange-induced electric polarization on the out-of-chain Cu^2+ centers substituting for Li-ions in LiVCuO_4 is taken into account. These substituent centers are proved to be an effective probe of the spin incommensurability and the magnetic field effects.

Keywords

multiferroicity nonstoichiometry chain cuprate LiVCuO_4 spin-current scenario exchange-induced electric polarization spin incommensurability

Cite

@article{arxiv.0801.1102,
  title  = {Multiferroicity due to nonstoichiometry in the chain cuprate LiVCuO_4},
  author = {A. S. Moskvin and S. -L. Drechsler},
  journal= {arXiv preprint arXiv:0801.1102},
  year   = {2009}
}

Comments

7 pages, 5 figures, accepted in Europhys. Letters

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