A New Phase of the S= 1 Bilinear-Biquadratic Chain: -a Trimerized State-

Kiyohide Nomura; Satoshi Takada

doi:10.1143/JPSJ.60.389

A New Phase of the S= 1 Bilinear-Biquadratic Chain: -a Trimerized State-

Kiyohide Nomura, Satoshi Takada

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27 Citations (Scopus)

Abstract

We investigate the S= 1 bilinear-biquadratic model. In some region, the trimerized variational state is a good candidate for the ground state. This explains why the Sutherland model (J1>0 and J2/ J1 = -1) has soft modes at q=0, ±2π/3. Moreover, the full phase diagram of this model is discussed. It is found that at the pure biquadratic ferromagnetic point, the ground state is extremely degenerate.

Original language	English
Pages (from-to)	389-392
Number of pages	4
Journal	journal of the physical society of japan
Volume	60
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.60.389
Publication status	Published - Jan 1 1991
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1143/JPSJ.60.389

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AB - We investigate the S= 1 bilinear-biquadratic model. In some region, the trimerized variational state is a good candidate for the ground state. This explains why the Sutherland model (J1>0 and J2/ J1 = -1) has soft modes at q=0, ±2π/3. Moreover, the full phase diagram of this model is discussed. It is found that at the pure biquadratic ferromagnetic point, the ground state is extremely degenerate.

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A New Phase of the S= 1 Bilinear-Biquadratic Chain: -a Trimerized State-

Abstract

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