LuFe2O4中的电荷序：反铁电基态及其与磁性的耦合
强关联电子
2008-11-28 v2 材料科学
摘要
报道了多铁性材料LuFe2O4的X射线散射实验。在320 K以下，超结构反射表明存在一个传播矢量接近(1/3,1/3,3/2)的非公度电荷序。相应的电荷构型（电子结构计算也认为其最稳定）包含具有反铁电堆叠的极性Fe/O双层。360 K时的漫散射（传播矢量为(1/3,1/3,0)）表明相邻双层之间存在铁电短程关联。非公度性的温度依赖性表明电荷序与磁性之间存在耦合。
引用
@article{arxiv.0807.3527,
title = {Charge order in LuFe2O4: antiferroelectric ground state and coupling to magnetism},
author = {M. Angst and R. P. Hermann and A. D. Christianson and M. D. Lumsden and C. Lee and M. -H. Whangbo and J. -W. Kim and P. J. Ryan and S. E. Nagler and W. Tian and R. Jin and B. C. Sales and D. Mandrus},
journal= {arXiv preprint arXiv:0807.3527},
year = {2008}
}
备注
v2: added more details on representation analysis; edited for accessibility to general readership. PRL in print