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arXiv:cond-mat/9911364 · Physical review. B, Condensed matter

Magnetization-plateau state of the S = 3 / 2 spin chain with single-ion anisotropy

Atsuhiro Kitazawa, Kiyomi Okamoto

Published Jul 1, 2000• 36 citations
arXivHTMLPDF

Abstract

We reexamine the numerical study of the magnetized state of the $S=3/2$ spin chain with single-ion anisotropy $D(>0)$ for the magnetization ${M=M}_{S}/3,$ where ${M}_{S}$ is the saturation magnetization. At this magnetization, we find that for $D<{D}_{c1}=0.387$ the system is critical and the magnetization plateau does not appear. For $D>{D}_{c1},$ the parameter region is divided into two parts ${D}_{c1}<D<{D}_{c2}=0.943$ and ${D}_{c2}<D.$ In each region, the system is gapful and the ${M=M}_{S}/3$ magnetization plateau appears in the magnetization process. From our numerical calculation, the intermediate region ${D}_{c1}<D<{D}_{c2}$ should be characterized by a magnetized valence-bond-solid state.

DOI
10.1103/physrevb.62.940

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