Neutron scattering evidence for isolated spin- 1 2 ladders in (C5 D12 N) 2 CuBr4

A. T. Savici; G. E. Granroth; C. L. Broholm; D. M. Pajerowski; C. M. Brown; D. R. Talham; M. W. Meisel; K. P. Schmidt; G. S. Uhrig; S. E. Nagler

doi:10.1103/PhysRevB.80.094411

Neutron scattering evidence for isolated spin- 1 2 ladders in (C5 D12 N) 2 CuBr4

A. T. Savici, G. E. Granroth, C. L. Broholm, D. M. Pajerowski, C. M. Brown, D. R. Talham, M. W. Meisel, K. P. Schmidt, G. S. Uhrig, S. E. Nagler

Direct Geometry

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Abstract

Inelastic neutron scattering was used to determine the spin Hamiltonian for the singlet ground-state system of fully deuterated BPCB, (C5 D12 N) 2 CuBr4. A two-leg spin-1/2 ladder model, with J□ = (1.09±0.01) meV and J□ = (0.296±0.005) meV, accurately describes the data. The experimental limit on the effective interladder exchange constant is | J int eff | ≲0.006 meV, and the limit on total diagonal, intraladder exchange is | JF + J F′ | ≤0.1 meV. Including the effects of copper to bromide covalent spin transfer on the magnetic form factor, the experimental ratios of intraladder bond energies are consistent with the predictions of continuous unitary transformation.

Original language	English
Article number	094411
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.80.094411
State	Published - Sep 18 2009

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Savici, A. T., Granroth, G. E., Broholm, C. L., Pajerowski, D. M., Brown, C. M., Talham, D. R., Meisel, M. W., Schmidt, K. P., Uhrig, G. S., & Nagler, S. E. (2009). Neutron scattering evidence for isolated spin- 1 2 ladders in (C5 D12 N) 2 CuBr4. Physical Review B - Condensed Matter and Materials Physics, 80(9), Article 094411. https://doi.org/10.1103/PhysRevB.80.094411

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title = "Neutron scattering evidence for isolated spin- 1 2 ladders in (C5 D12 N) 2 CuBr4",

abstract = "Inelastic neutron scattering was used to determine the spin Hamiltonian for the singlet ground-state system of fully deuterated BPCB, (C5 D12 N) 2 CuBr4. A two-leg spin-1/2 ladder model, with J□ = (1.09±0.01) meV and J□ = (0.296±0.005) meV, accurately describes the data. The experimental limit on the effective interladder exchange constant is | J int eff | ≲0.006 meV, and the limit on total diagonal, intraladder exchange is | JF + J F′ | ≤0.1 meV. Including the effects of copper to bromide covalent spin transfer on the magnetic form factor, the experimental ratios of intraladder bond energies are consistent with the predictions of continuous unitary transformation.",

author = "Savici, {A. T.} and Granroth, {G. E.} and Broholm, {C. L.} and Pajerowski, {D. M.} and Brown, {C. M.} and Talham, {D. R.} and Meisel, {M. W.} and Schmidt, {K. P.} and Uhrig, {G. S.} and Nagler, {S. E.}",

year = "2009",

month = sep,

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doi = "10.1103/PhysRevB.80.094411",

language = "English",

volume = "80",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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T1 - Neutron scattering evidence for isolated spin- 1 2 ladders in (C5 D12 N) 2 CuBr4

AU - Savici, A. T.

AU - Granroth, G. E.

AU - Broholm, C. L.

AU - Pajerowski, D. M.

AU - Brown, C. M.

AU - Talham, D. R.

AU - Meisel, M. W.

AU - Schmidt, K. P.

AU - Uhrig, G. S.

AU - Nagler, S. E.

PY - 2009/9/18

Y1 - 2009/9/18

N2 - Inelastic neutron scattering was used to determine the spin Hamiltonian for the singlet ground-state system of fully deuterated BPCB, (C5 D12 N) 2 CuBr4. A two-leg spin-1/2 ladder model, with J□ = (1.09±0.01) meV and J□ = (0.296±0.005) meV, accurately describes the data. The experimental limit on the effective interladder exchange constant is | J int eff | ≲0.006 meV, and the limit on total diagonal, intraladder exchange is | JF + J F′ | ≤0.1 meV. Including the effects of copper to bromide covalent spin transfer on the magnetic form factor, the experimental ratios of intraladder bond energies are consistent with the predictions of continuous unitary transformation.

AB - Inelastic neutron scattering was used to determine the spin Hamiltonian for the singlet ground-state system of fully deuterated BPCB, (C5 D12 N) 2 CuBr4. A two-leg spin-1/2 ladder model, with J□ = (1.09±0.01) meV and J□ = (0.296±0.005) meV, accurately describes the data. The experimental limit on the effective interladder exchange constant is | J int eff | ≲0.006 meV, and the limit on total diagonal, intraladder exchange is | JF + J F′ | ≤0.1 meV. Including the effects of copper to bromide covalent spin transfer on the magnetic form factor, the experimental ratios of intraladder bond energies are consistent with the predictions of continuous unitary transformation.

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U2 - 10.1103/PhysRevB.80.094411

DO - 10.1103/PhysRevB.80.094411

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VL - 80

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 9

M1 - 094411

ER -

Neutron scattering evidence for isolated spin- 1 2 ladders in (C5 D12 N) 2 CuBr4

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