Magnetization Plateau in the Frustrated Spin Ladder

Details Magnetization Plateau in the Frustrated Spin Ladder Magnetization Plateau in the Frustrated Spin Ladder

1999-12-14

arxiv.org/abs/cond-mat/9912234v2

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 9 figures, other comments

Scientific paper

10.1143/JPSJ.69.37

The magnetization process of the S=1/2 antiferromagnetic spin ladder at T=0 is studied by the exact diagonalization of finite clusters and size scaling analyses. It is found that a magnetization plateau appears at half the saturation value (m=1/2) in the presence of a sufficiently large next-nearest-neighbor exchange interaction to yield the frustration, when the rung coupling is larger than the leg one. The phase diagram at m=1/2 is given by the analysis based on the conformal invariance. The magnetization curves are also presented in several cases.

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