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    题名: Energy dependence of commensurate neutron scattering peak in the doped two-leg ladder antiferromagnet Sr14-xCaxCu24O41
    作者: He, Jianhui;Feng, Shiping;Chen, Wei-yeu
    贡献者: 淡江大學物理學系
    日期: 2003-03
    上传时间: 2013-07-09 15:19:24 (UTC+8)
    出版者: College Park: American Physical Society
    摘要: 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.
    關聯: Physical Review B (Condensed Matter and Materials Physics) 67(9), 094402(6 pages)
    DOI: 10.1103/PhysRevB.67.094402
    显示于类别:[物理學系暨研究所] 期刊論文


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