arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.01948cond-mat.mtrl-scicond-mat.str-el
收藏

非磁性极性金属Mott多铁性材料的设计

Design of a Mott Multiferroic from a Non-Magnetic Polar Metal

Danilo Puggioni, Gianluca Giovannetti, Massimo Capone, James M. Rondinelli

摘要:

我们结合密度泛函和动力学平均场论研究了新发现的“铁电”金属LiOsO $_3$的电子性质。我们发现,该材料是接近莫特转变和电子相关性可以调整工程莫特多铁性态的1/1超晶格的LiOsO $_3$和LiNbO $_3$。通过电子结构计算,预测了(LiOsO $_3$)$_1$ /(LiNbO $_3$)$_1$超晶格是一种I型多铁性材料,其铁电极化率为41.2 $μ$ C cm $^{-2}$,居里温度为927,K,Néel温度为671,K.我们的研究结果支持了一个路线走向高温多铁性,\emph{i.e.},驱动非磁性\emph{polar metals}相关绝缘磁状态。

英文摘要:

We examine the electronic properties of newly discovered "ferroelectric" metal LiOsO$_3$ combining density-functional and dynamical mean-field theories. We show that the material is close to a Mott transition and that electronic correlations can be tuned to engineer a Mott multiferroic state in 1/1 superlattice of LiOsO$_3$ and LiNbO$_3$. We use electronic structure calculations to predict that the (LiOsO$_3$)$_1$/(LiNbO$_3$)$_1$ superlattice is a type-I multiferroic material with a ferrolectric polarization of 41.2~$μ$C cm$^{-2}$, Curie temperature of 927\,K, and Néel temperature of 671\,K. Our results support a route towards high-temperature multiferroics, \emph{i.e.}, driving non-magnetic \emph{polar metals} into correlated insulating magnetic states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑