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

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 Δ 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.

arXiv comment4 pages, 5 figures

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Cited by in corpus (12)

• Direct observation of the Higgs amplitude mode in a two-dimensional quantum antiferromagnet near the quantum critical point
• Field induced spontaneous quasiparticle decay and renormalization of quasiparticle dispersion in a quantum antiferromagnet
• Spin dynamics in pressure-induced magnetically-ordered phases in PHCC
• Field-concentration phase diagram of a quantum spin liquid with bond defects
• Evidence for pressure induced unconventional quantum criticality in the coupled spin ladder antiferromagnet C${}_9$H${}_{18}$N${}_2$CuBr${}_4$
• High pressure Raman study of the quantum magnet (C${}_4$H${}_{12}$N${}_2$)Cu${}_2$Cl${}_6$
• Structural and magnetic properties in the quantum S=1/2 dimer systems Ba3(Cr1-xVx)2O8 with site disorder
• Effect of disorder on a pressure-induced $z=1$ magnetic quantum phase transition
• Field induced non-BEC transitions in frustrated magnets
• Magnetic resonance of collective paramagnets with gapped excitations spectrum
• Formation of the S=1 paramagnetic centers in the bond-diluted spin-gap magnet
• One-dimensional physics of the frustrated quantum magnet PHCC