Excitations in a four-leg antiferromagnetic Heisenberg spin tube

V. O. Garlea, A. Zheludev, L. P. Regnault, J. H. Chung, Y. Qiu, M. Boehm, K. Habicht, M. Meissner

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Abstract

Inelastic neutron scattering is used to investigate magnetic excitations in the quasi-one-dimensional quantum spin-liquid system Cu2Cl4•D8C4SO2. Contrary to previously conjectured models that relied on bond-alternating nearest-neighbor interactions in the spin chains, the dominant interactions are actually next-nearest-neighbor in-chain antiferromagnetic couplings. The appropriate Heisenberg Hamiltonian is equivalent to that of a S=1/2 4-leg spin-tube with almost perfect one dimensionality and no bond alternation. A partial geometric frustration of rung interactions induces a small incommensurability of short-range spin correlations.

Original languageEnglish
Article number037206
JournalPhysical review letters
Volume100
Issue number3
DOIs
Publication statusPublished - 2008 Jan 25
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Garlea, V. O., Zheludev, A., Regnault, L. P., Chung, J. H., Qiu, Y., Boehm, M., Habicht, K., & Meissner, M. (2008). Excitations in a four-leg antiferromagnetic Heisenberg spin tube. Physical review letters, 100(3), [037206]. https://doi.org/10.1103/PhysRevLett.100.037206