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S=1/2三量体量子スピン鎖における動的感受率の数値的研究

Numerical study on the dynamical susceptibility of the S=1/2 trimerized quantum spin chain

肘井 敬吾*; 坂井 徹; 宮下 精二*; 太田 仁*

Hijii, Keigo*; Sakai, Toru; Miyashita, Seiji*; Ota, Hitoshi*

一次元S=1/2三量体量子スピン鎖における動的感受率の数値的な研究を行った。以前に網代らによって高周波ESRにおいて観測された単一S=3/2量子スピン鎖とは異なる複合スピンS=3/2鎖を特徴づけると考えられる結果を理論的に解明すべく数値計算を行い、動的感受率の磁場の強さ依存性や温度依存性等を議論する。

We numerically investigated the dynamical susceptibility of the S=1/2 trimerized quantum spin chain. In order to solve the mechanism of the special feature, which is characteristic of the composite spins different from the single S=3/2, observed in the previous high frequency ESR measurement by Prof. Ajiro, we will report the numerical result of the external field dependence and the temperature dependence of the dynamical susceptibility.

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