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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27799

    Title: Energy dependence of commensurate neutron scattering peak in the doped two-leg ladder antiferromagnet Sr14-xCaxCu24O41
    Authors: He, Jianhui;Feng, Shiping;Chen, Wei-yeu
    Contributors: 淡江大學物理學系
    Date: 2003-03
    Issue Date: 2013-07-09 15:19:24 (UTC+8)
    Publisher: College Park: American Physical Society
    Abstract: The dynamical spin response of doped two-leg ladder antiferromagnets is investigated based on the fermion-spin approach. Our calculations clearly demonstrate a crossover from incommensurate antiferromagnetism in the weak-interchain-coupling regime to commensurate spin fluctuation in the strong-interchain-coupling regime. In particular, the nuclear spin-lattice relaxation rate extracted from the commensurate spin fluctuation decreases exponentially with decreasing temperatures. The behaviors of the spin dynamics in the strong-coupling regime are quantitatively close to the experimental results of Sr14-xCaxCu24O41.
    Relation: Physical Review B (Condensed Matter and Materials Physics) 67(9), 094402(6 pages)
    DOI: 10.1103/PhysRevB.67.094402
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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