Abstract This paper numerically investigates the magnetoelastic instability in the S = 1/2 XXZ rings containing finite spins N with antiferromagnetic nearest-neighbour (NN) and next-nearest neighbour (NNN) coupling. It finds that, as the NNanisotropy equals the NNN anisotropy , there exists a critical NNN coupling strength (≈0.5), at which the systems always locate in dimerized phase for arbitrary large spring constant. As , the values of are dependent on N and the difference of ().
Li Peng-Fei(李鹏飞) and Chen Zhong-Hua(陈中华) Magnetoelastic instability in the XXZ rings with next-nearest neighbour coupling 2010 Chin. Phys. B 19 027503
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