Energy dependence of commensurate neutron scattering peak in the doped two-leg ladder antiferromagnet Sr14-xCaxCu24O41

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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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