Spin dimers under staggered and random field in Cu$_2$Fe$_2$Ge$_4$O$_{13}

T. Masuda; K. Kakurai; A. Zheludev

Spin dimers under staggered and random field in Cu$_2$Fe$_2$Ge$_4$O$_{13}

Strongly Correlated Electrons 2009-10-28 v2

Authors: T. Masuda , K. Kakurai , A. Zheludev

Abstract

We study $S=1/2$ dimer excitation in a coupled chain and dimer compound Cu $_2$ Fe $_2$ Ge $_4$ O $_{13} by inelastic neutron scattering technique. The Zeeman split of the dimer triplet by a staggered field is observed at low temperature. With the increase of temperature the effect of random field is detected by a drastic broadening of the triplet excitation. Basic dynamics of dimer in the staggered and random fields are experimentally identified in Cu$ _2 $Fe$ _2 $Ge$ _4 $O$ _{13}.

Keywords

spin dimer staggered field random field inelastic neutron scattering Zeeman splitting Cu₂Fe₂Ge₄O₁₃

Cite

@article{arxiv.0909.2402,
  title  = {Spin dimers under staggered and random field in Cu$_2$Fe$_2$Ge$_4$O$_{13}},
  author = {T. Masuda and K. Kakurai and A. Zheludev},
  journal= {arXiv preprint arXiv:0909.2402},
  year   = {2009}
}

Comments

4 pages, 4 figures, to be published in Phys. Rev. B RC

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