Magnetic Properties for the One-Dimensional Multicomponent Spin-Gap System

Details Magnetic Properties for the One-Dimensional Multicomponent Spin-Gap System Magnetic Properties for the One-Dimensional Multicomponent Spin-Gap System

2001-01-29

arxiv.org/abs/cond-mat/0101423v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 8 eps figures, to appear in PRB

Scientific paper

10.1103/PhysRevB.63.144413

Magnetic properties for the one-dimensional multicomponent quantum spin system with the excitation gap are studied based on the integrable spin model introduced by Bariev {\it et al}. By exactly computing the magnetization, we show how the characteristic structure with plateaus and cusps appears in the magnetization process. To study low-energy dynamics of the system, we apply the finite-size scaling analysis to the excitation spectrum, and thereby evaluate the power-law exponent as well as the enhancement factor for the low-temperature NMR relaxation rate $1/T_1$. We discuss the critical properties of $1/T_1$ around plateaus and cusps in the magnetization curve.

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