Zigzag Charge Ordering in alpha'-NaV2O5
Zigzag Charge Ordering in alpha'-NaV2O5
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α-NaV2O5 中的锯齿形电荷排序
DOI：
10.1143/jpsj.69.2751
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Ueda
中科院分区：
文献类型：
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作者：
T. Ohama;A. Goto;T. Shimizu;E. Ninomiya;H. Sawa;M. Isobe;Y. Ueda
报道了α ′-NaV_2O_5单晶样品的~（23）Na NMR谱测量结果。在电荷有序相，观察到的不等价钠网站的数量是比预期的空间群Fmm 2的低温结构迄今为止报道。这种不一致性表明，既包括原子位移又包括电荷位移的真实的结构具有较低的对称性。据认为，锯齿排序是最有可能的。NMR谱在相变温度附近的温度变化与二级相变的温度变化不一致。由此得出结论，电荷有序转变是一级的。
23Na NMR spectrum measurements in alpha'-NaV2O5 with a single- crystalline sample are reported. In the charge-ordered phase, the number of inequivalent Na sites observed is more than that expected from the low-temperature structures of space group Fmm2 reported so far. This disagreement indicates that the real structure including both atomic displacement and charge disproportionation is of lower symmetry. It is suggested that zigzag ordering is the most probable. The temperature variation of the NMR spectra near the transition temperature is incompatible with that of second-order transitions. It is thus concluded that the charge ordering transition is first-order.
自旋-Peierls系统中链间耦合的影响
DOI：
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发表时间：
2008
期刊：
影响因子：
--
作者：
Y. Matsushima;M. Shimizu;K. Satoh;T. Yotsuya;O. Sate;M. Kato;M. Hayashi;H. Ebisawa;T. Koyama;M. Machida;T. Ishida;H. Suwa and S. Todo
通讯作者：
H. Suwa and S. Todo