Excitations in a quantum spin liquid with random bonds

D. Huvonen; S. Zhao; G. Ehlers; M. Månsson; S. N. Gvasaliya; A. Zheludev

doi:10.1103/PhysRevB.86.214408

Excitations in a quantum spin liquid with random bonds

Strongly Correlated Electrons 2013-07-02 v1

Authors: D. Huvonen , S. Zhao , G. Ehlers , M. Månsson , S. N. Gvasaliya , A. Zheludev

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Abstract

We present results of inelastic neutron scattering study on two bond disordered quasi twodimensional quantum magnets (C $_4$ H $_12$ N $_2$ )Cu $_2$ (Cl $_{1-x}$ Br $_x$ ) $_6$ with x=0.035 and 0.075. We observe the increase of spin gap, reduction of magnon bandwidth and a decrease of magnon lifetimes compared to x=0 sample. Additional magnon damping is observed at higher energies away from zone center which is found to follow the density of single particle states.

Keywords

spin excitations in condensed matter quantum spin liquids nuclear scattering

Cite

@article{arxiv.1210.5899,
  title  = {Excitations in a quantum spin liquid with random bonds},
  author = {D. Huvonen and S. Zhao and G. Ehlers and M. Månsson and S. N. Gvasaliya and A. Zheludev},
  journal= {arXiv preprint arXiv:1210.5899},
  year   = {2013}
}

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