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arXiv:1910.02585 · International Conference on Strongly Correlated Electron Systems (SCES)

Magnetization Plateau of the Distorted Diamond Spin Chain

Yuki Ueno, Tomosuke Zenda, Yuta Tachibana, Kiyomi Okamoto, Tôru Sakai

Published Mar 18, 2020• 2 citations
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Abstract

The frustrated quantum spin system on the distorted diamond chain lattice is investigated using the numerical diagonalization of finite-size clusters and the level spectroscopy analysis. In the previous work this system was revealed to exhibit the 1/3 magnetization plateau due to two different mechanisms depending on the coupling parameters, and the phase diagram at the 1/3 magnetization was obtained. In the present work it is found that the 1/3 magnetization plateau vanishes for sufficiently large $XY$-like coupling anisotropy. The phase diagram based on the level spectroscopy analysis is also presented.

DOI
10.7566/jpscp.30.011085

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The frustrated quantum spin system on the distorted diamond chain lattice is investigated using the numerical diagonalization of finite-size clusters and the level spectroscopy analysis. In the previous work this system was revealed to exhibit the 1/3 magnetization plateau due to two different mechanisms depending on the coupling parameters, and the phase diagram at the 1/3 magnetization was obtained. In the present work it is found that the 1/3 magnetization plateau vanishes for sufficiently large XYXYXY-like coupling anisotropy. The phase diagram based on the level spectroscopy analysis is also presented.
Magnetization Plateau of the S=12S={1 \over 2}S=21​ Distorted Diamond Spin Chain with Ferromagnetic Interaction
The magnetization process of the S=1/2S=1/2S=1/2 distorted diamond spin chain with ferromagnetic interactions is investigated using the numerical diagonalization of finite-size clusters. The level spectroscopy analysis applied for the model with the spin anisotropy indicates that two different magnetization plateau phases appear at 1/3 of the saturation magnetization. The phase diagrams for some typical interaction parameters are presented. In addition the magnetization curves for several typical parameters are obtained.
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Abstract The magnetization process of the S = 1/2 distorted diamond spin chain with ferromagnetic interactions is investigated using the numerical diagonalization of finite-size clusters. The level spectroscopy analysis applied for the model with the spin anisotropy indicates that two different magnetization plateau phases appear at 1/3 of the saturation magnetization. The phase diagrams for some typical interaction parameters are presented. In addition the magnetization curves for several typical parameters are obtained.
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The magnetization process of the S=3/2S=3/2S=3/2 quantum spin chain with the XXZXXZXXZ anisotropy and the single-ion anisotropy DDD is investigated using the numerical diagonalization of finite-size clusters and the level spectroscopy analysis. We obtain the phase diagrams at 1/3 and 2/3 of the saturation magnetization to find that the translational-symmetry-broken magnetization plateau appears for the first time. The similarity and the difference between the phase diagrams of the present model and the related models are discussed by use of the discrete parameters of the models. In addition several typical magnetization curves are presented.