Quantum Phase Transition in Quasi-One-Dimensional Spin-1 System SrNi2V2O8 Induced by Cation Substitution
Quantum Phase Transition in Quasi-One-Dimensional Spin-1 System SrNi2V2O8 Induced by Cation Substitution
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DOI：
10.1143/jpsj.77.013703
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发表时间：
2008-01
影响因子：
1.7
通讯作者：
Zhangzhen He;Y. Ueda
中科院分区：
文献类型：
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作者：
Zhangzhen He;Y. Ueda
SrNi 2 V2 O 8的磁基态已经被许多作者研究过[Phys.Rev.Lett. 83（1999）632; Phys. Rev. B 62（2000）8921;和Phys. Rev. B 73（2006）012407]，显示了SrNi 2 V 2 O 8福尔斯落入有序状态或自旋液体状态的不同结论。在SrNi 2 V2 O 8中，通过少量的Ca 2+离子的取代，我们观察到了自旋液体态到有序态的量子相变。我们的实验结果提供了具体的证据表明，SrNi 2 V2 O 8可能处于无序基态，这是接近Sakai-Takahashi相图上的自旋液体和Ising类Neel有序态之间的相边界。
Magnetic ground state of SrNi 2 V 2 O 8 has been investigated by many authors [Phys. Rev. Lett. 83 (1999) 632; Phys. Rev. B 62 (2000) 8921; and Phys. Rev. B 73 (2006) 012407], showing the different conclusions of which SrNi 2 V 2 O 8 falls into an ordered state or a spin-liquid state. In this study, we observed a quantum phase transition of a spin-liquid state to an ordered state in SrNi 2 V 2 O 8 by a minor substitution of Ca 2+ ions. Our experimental results provide concrete evidence that SrNi 2 V 2 O 8 is likely in a disordered ground state, which is close to the phase boundary between the spin-liquid and the Ising-like Neel ordered state on the Sakai–Takahashi phase diagram.