Excitations in a Four-Leg Antiferromagnetic Heisenberg Spin Tube,

Journal Article · Mon Dec 31 23:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.100.037206· OSTI ID:968280

Garlea, Vasile O ^[1]; Zheludev, Andrey I ^[1]; Regnault, L. -P. ^[2]; Chung, J. -H. ^[3]; Qiu, Y. ^[3]; Boehm, Martin ^[4]; Habicht, Klaus ^[5]; Meissner, Michael ^[5]; Fernandez-Baca, Jaime A ^[1]

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1. ORNL
2. French Atomic Energy Commission (CEA), Grenoble
3. National Institute of Standards and Technology (NIST)
4. Institut Laue-Langevin (ILL)
5. Hahn-Meitner Institut, Berlin, Germany

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.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Flux Isotope Reactor (HFIR)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 968280
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 100
• Country of Publication: United States
• Language: English