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Ferroelectricity coexisted with p-orbital ferromagnetism and metallicity in two-dimensional metal oxynitrides
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作者 haoqiang ai Feifei Li +5 位作者 Haoyun Bai Dong Liu Kin Ho Lo Shengyuan AYang Yoshiyuki Kawazoe Hui Pan 《npj Computational Materials》 SCIE EI CSCD 2022年第1期581-587,共7页
Two-dimensional (2D) multiferroics have attracted increasing interests in basic science and technological fields in recent years.However,most reported 2D magnetic ferroelectrics are based on the d-electron magnetism,w... Two-dimensional (2D) multiferroics have attracted increasing interests in basic science and technological fields in recent years.However,most reported 2D magnetic ferroelectrics are based on the d-electron magnetism,which makes them rather rare due to the empirical d^(0) rule and limits their applications for low magnetic phase transition temperature.In this work,we demonstrate that the ferroelectricity can coexist with the p-electron-induced ferromagnetism without the limitation of d^(0) rule and metallicity in a family of stable 2D MXene-analogous oxynitrides,X_(2)NO_(2) (X = In,Tl).Remarkably,the itinerant character of p electrons can lead to the strong ferromagnetic metallic states.Furthermore,a possible magnetoelectric effect is manifested in a Tl_(2)NO_(2)/WTe_(2) heterostructure through the interface engineering.Our findings provide an alternative possible route toward 2D multiferroics and enrich the concept of ferroelectric metals. 展开更多
关键词 metallic FERROELECTRIC dimensional
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