学術雑誌論文 Quantum phase transition in the twisted three-leg spin tube

Ito, K.  ,  Ykoo, S.  ,  Okamoto, K.  ,  Sakai, T.

136pp.42 - 44 , 2017-11
ISSN:0277-5387
内容記述
We investigate the spin-1/2 twisted three-leg antiferromagnetic quantum spin tube in the presence of the easy-plane anisotropy, using the numerical diagonalization of finite-size clusters. We show cases of the existence and the absence of magnetization plateau at 1/3 height of saturation magnetization when the anisotropy is tuned. The phenomenological-renormalization group analysis indicates a quantum phase transition between the 1/3 magnetization plateau phase and the plateauless one. The phase diagram is also presented.

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