Neutron scattering study of a quasi-2D spin-1/2 dimer system Piperazinium Hexachlorodicuprate under hydrostatic pressure

Tao Hong; C. Stock; I. Cabrera; C. Broholm; Y. Qiu; J. B. Leao; S. J. Poulton; J. R. D. Copley

doi:10.1103/PhysRevB.82.184424

Neutron scattering study of a quasi-2D spin-1/2 dimer system Piperazinium Hexachlorodicuprate under hydrostatic pressure

Strongly Correlated Electrons 2010-12-01 v1

Authors: Tao Hong , C. Stock , I. Cabrera , C. Broholm , Y. Qiu , J. B. Leao , S. J. Poulton , J. R. D. Copley

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Abstract

We report inelastic neutron scattering study of a quasi-two-dimensional S=1/2 dimer system Piperazinium Hexachlorodicuprate under hydrostatic pressure. The spin gap {\Delta} becomes softened with the increase of the hydrostatic pressure up to P= 9.0 kbar. The observed threefold degenerate triplet excitation at P= 6.0 kbar is consistent with the theoretical prediction and the bandwidth of the dispersion relation is unaffected within the experimental uncertainty. At P= 9.0 kbar the spin gap is reduced to 0.55 meV from 1.0 meV at ambient pressure.

Keywords

inelastic neutron scattering quasi-2D spin-1/2 dimer system hydrostatic pressure spin gap triplet excitation

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@article{arxiv.1011.0635,
  title  = {Neutron scattering study of a quasi-2D spin-1/2 dimer system Piperazinium Hexachlorodicuprate under hydrostatic pressure},
  author = {Tao Hong and C. Stock and I. Cabrera and C. Broholm and Y. Qiu and J. B. Leao and S. J. Poulton and J. R. D. Copley},
  journal= {arXiv preprint arXiv:1011.0635},
  year   = {2010}
}

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4 pages, 5 figures

Neutron scattering study of a quasi-2D spin-1/2 dimer system Piperazinium Hexachlorodicuprate under hydrostatic pressure

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