2010/11/02 by Tao Hong, Christian Stock, C. Stock +8
Chemistry · Materials Science · Physics and Astronomy · #Advanced NMR Techniques and Applications #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.82.184424
published as Physical Review B 82, 184424 (2010) · 4 pages, 5 figures
arxiv created 2010/11/02 · openalex publication_date 2010/11/22 · arxiv updated 2010/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report inelastic neutron scattering study of a quasi-two-dimensional S=(1)/(2) dimer system piperazinium hexachlorodicuprate under hydrostatic pressure. The spin gap \ensuremathΔ 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 \ensuremathΔ=0.55 meV from \ensuremathΔ=1.0 meV at ambient pressure.