Field-Induced Gaps in the Frustrated Spin Ladder

Abstract

We study the magnetization process of the $S=1/2$ antiferromagnetic spin ladder in the presence of the second and the third-neighbor couplings which lead to frustration with the typical nearest-neighbor coupling. We use degenerate perturbation theory and level spectroscopy analysis of the numerical diagonalization data of the Hamiltonian for finite systems. We find two kinds of plateaux at half the saturation moment in the magnetization curve. One is mainly due to the second-neighbor couplings and the other to the third-neighbor couplings. The mechanisms of these two plateaux are quite different with each other.

9 pages,7figures, other comments

References in corpus (1)

• Magnetization Plateau in the Frustrated Spin Ladder

Cited by in corpus (10)

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• Field-Induced gap due to four-spin exchange in a spin ladder
• Magnetization Plateau in the S=1 Spin Ladder with Competing Interactions
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• Translational symmetry broken magnetization plateau of the S=1 antiferromagnetic Heisenberg chain with competing anisotropies
• Magnetization curve of the kagome-strip-lattice antiferromagnet
• Translational-Symmetry-Broken Magnetization Plateaux of the $S=3/2$ Anisotropic Antiferromagnetic Chain