Neutron scattering study of a quasi-two-dimensional 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-two-dimensional 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

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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 Δ becomes softened with the increase of the hydrostatic pressure up to P=9.0kbar. The observed threefold degenerate triplet excitation at P=6.0kbar is consistent with the theoretical prediction and the bandwidth of the dispersion relation is unaffected within the experimental uncertainty. At P=9.0kbar the spin gap is reduced to Δ=0.55meV from Δ=1.0meV at ambient pressure.

Original language	English
Article number	184424
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	82
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.82.184424
State	Published - Nov 22 2010

Funding

Funders	Funder number
Directorate for Mathematical and Physical Sciences	0454672, 0706553, 0306940

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10.1103/PhysRevB.82.184424

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Hong, T., Stock, C., Cabrera, I., Broholm, C., Qiu, Y., Leao, J. B., Poulton, S. J., & Copley, J. R. D. (2010). Neutron scattering study of a quasi-two-dimensional spin- 1/2 dimer system: Piperazinium hexachlorodicuprate under hydrostatic pressure. Physical Review B - Condensed Matter and Materials Physics, 82(18), Article 184424. https://doi.org/10.1103/PhysRevB.82.184424

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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 Δ becomes softened with the increase of the hydrostatic pressure up to P=9.0kbar. The observed threefold degenerate triplet excitation at P=6.0kbar is consistent with the theoretical prediction and the bandwidth of the dispersion relation is unaffected within the experimental uncertainty. At P=9.0kbar the spin gap is reduced to Δ=0.55meV from Δ=1.0meV at ambient pressure.",

author = "Tao Hong and C. Stock and I. Cabrera and C. Broholm and Y. Qiu and Leao, {J. B.} and Poulton, {S. J.} and Copley, {J. R.D.}",

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T1 - Neutron scattering study of a quasi-two-dimensional spin- 1/2 dimer system

T2 - Piperazinium hexachlorodicuprate under hydrostatic pressure

AU - Hong, Tao

AU - Stock, C.

AU - Cabrera, I.

AU - Broholm, C.

AU - Qiu, Y.

AU - Leao, J. B.

AU - Poulton, S. J.

AU - Copley, J. R.D.

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N2 - 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=9.0kbar. The observed threefold degenerate triplet excitation at P=6.0kbar is consistent with the theoretical prediction and the bandwidth of the dispersion relation is unaffected within the experimental uncertainty. At P=9.0kbar the spin gap is reduced to Δ=0.55meV from Δ=1.0meV at ambient pressure.

AB - 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=9.0kbar. The observed threefold degenerate triplet excitation at P=6.0kbar is consistent with the theoretical prediction and the bandwidth of the dispersion relation is unaffected within the experimental uncertainty. At P=9.0kbar the spin gap is reduced to Δ=0.55meV from Δ=1.0meV at ambient pressure.

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DO - 10.1103/PhysRevB.82.184424

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JO - Physical Review B - Condensed Matter and Materials Physics

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ER -

Neutron scattering study of a quasi-two-dimensional spin- 1/2 dimer system: Piperazinium hexachlorodicuprate under hydrostatic pressure

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