Hole concentration dependence of the ordering process of the stripe order in La2-xSrxNiO4
Hole concentration dependence of the ordering process of the stripe order in La2-xSrxNiO4
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La2-xSrxNiO4 中条带有序化过程的空穴浓度依赖性
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
Y. Tokura
中科院分区：
文献类型：
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作者：
R. Kajimoto;T. Kakeshita;H. Yoshizawa;T. Tanabe;T. Katsufuji;Y. Tokura
用中子衍射实验研究了x约为1/3时La{2-x}Sr{x}NiO{4}中条纹有序的排序过程。在高温下形成条纹序时，对于x位于1/3两侧的样品，条纹序的不可通约度\epsilon倾向于显示接近1/3的值。然而，随着温度的降低，\epsilon变得接近于由\epsilon = n_h的线性关系确定的值，其中n_h为空穴浓度。这种ε的变化通过条纹和反铁磁畴中载流子密度的变化强烈地影响条纹序的特征。
Ordering process of stripe order in La{2-x}Sr{x}NiO{4} with x being around 1/3 was investigated by neutron diffraction experiments. When the stripe order is formed at high temperature, incommensurability \epsilon of the stripe order has a tendency to show the value close to 1/3 for the samples with x at both sides of 1/3. With decreasing temperature, however, \epsilon becomes close to the value determined by the linear relation of \epsilon = n_h, where n_h is a hole concentration. This variation of the \epsilon strongly affects the character of the stripe order through the change of the carrier densities in stripes and antiferromagnetic domains.