Excitations in a four-leg antiferromagnetic Heisenberg spin tube
- Authors
- Garlea, V. O.; Zheludev, A.; Regnault, L. -P.; Chung, J. -H.; Qiu, Y.; Boehm, M.; Habicht, K.; Meissner, M.
- Issue Date
- 25-1월-2008
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.100, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 100
- Number
- 3
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/124213
- DOI
- 10.1103/PhysRevLett.100.037206
- ISSN
- 0031-9007
- Abstract
- Inelastic neutron scattering is used to investigate magnetic excitations in the quasi-one-dimensional quantum spin-liquid system Cu(2)Cl(4)center dot D(8)C(4)SO(2). 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.
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