Comment on "competition between helimagnetism and commensurate quantum spin correlations in LiCu2O2".

  title={Comment on "competition between helimagnetism and commensurate quantum spin correlations in LiCu2O2".},
  author={S. -L. Drechsler and Jiř{\'i} M{\'a}lek and Johannes Richter and Alexander S. Moskvin and Andrei A. Gippius and Helge Rosner},
  journal={Physical review letters},
  volume={94 3},
          039705; author reply 039706
The microscopic origin of the recently observed helical structure in LiCu2O2 [1] is considered. It is shown that the frustrated antiferromagnetic double chain scenario adopted in Ref.1 is unrealistic. It should be replaced by a frustrated single-chain (CuO2) scenario proposed in Ref. 2 with ferromagnetic nearest neighbor and antiferromagnetic next nearest neighbor exchange integrals \. [1] T. Masuda et al. Phys. Rev. Lett. 92 (2004), 177201. [2] A. Gippius et al. Phys. Rev. B 70 (2004), R01426… 
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