论文标题
抗鲁德斯登 - 流浪者结构中的铁电和多效性
Ferroelectricity and multiferroicity in anti-Ruddlesden-Popper structures
论文作者
论文摘要
将铁电性与其他特性（例如可见光吸收或远距离磁性顺序）相结合，需要发现新的铁电材料家族。在这里，通过分析声子条带结构的高通量数据库，我们确定了一个新的结构性抗Ruddlesden-Popper阶段的结构家族，$ _4 $ x $ _2 $ o（A = CA，SR，BA，BA，EU，EU，EU，X = SB，P，AS，AS，BI）显示了铁电和抗Ferroelectric和抗Ferroelectric coprapiorcerric caperiorric caperior。发现的铁电基因属于新的高空电类，即使在开路边界条件下也是如此。极性扭曲涉及O阴离子对顶A阳离子的运动，并由内部化学菌株产生的几何影响驱动。在这个新的结构家庭中，我们表明欧盟$ _4 $ sb $ _2 $ o在同一个原子网站上结合了耦合的铁磁和铁电订单，这在材料物理学中非常罕见。
Combining ferroelectricity with other properties such as visible light absorption or long-range magnetic order requires the discovery of new families of ferroelectric materials. Here, through the analysis of a high-throughput database of phonon band structures, we identify a new structural family of anti-Ruddlesden-Popper phases A$_4$X$_2$O (A=Ca, Sr, Ba, Eu, X=Sb, P, As, Bi) showing ferroelectric and anti-ferroelectric behaviors. The discovered ferroelectrics belong to the new class of hyperferroelectrics which polarize even under open-circuit boundary conditions. The polar distortion involves the movement of O anions against apical A cations and is driven by geometric effects resulting from internal chemical strains. Within this new structural family, we show that Eu$_4$Sb$_2$O combines coupled ferromagnetic and ferroelectric order at the same atomic site, a very rare occurrence in materials physics.
