Hong, T.
, Stock, C.
, Cabrera, I.
, Broholm, C.
, Qiu, Y.
, Leao, J.
, Poulton, S.
and Copley, J.
(2010),
Neutron Scattering Study of a Quasi-2D Spin-1/2 Dimer System Piperazinium Hexachlorodicuprate Under Hydrostatic Pressure, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906383
(Accessed October 25, 2025)
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Neutron Scattering Study of a Quasi-2D Spin-1/2 Dimer System Piperazinium Hexachlorodicuprate Under Hydrostatic Pressure
Published
Author(s)
Tao Hong, Chris Stock, I. Cabrera, , , , ,
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 while the bandwidth of the dispersion relation is almost unaffected. The observed threefold degenerate triplet excitation under hydrostatic pressure is consistent with the theoretical prediction. At P=9.0 kbar the spin gap is reduced to δ=0.55 meV from δ=1.0 meV at ambient pressure. The results allow us to predict a soft-mode quantum phase transition in this system at Papproximately equal}20 kbar.Citation
Physical Review B
Volume
12
Pub Type
Journals
Download Paper
Keywords
dimer, pressure, neutron scattering, spin excitation
Citation
Issues
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Created November 21, 2010, Updated October 12, 2021