论文标题
磁电多效性Janus单层的预测（X/Y = F，Cl，Br，I或I，以及X $ \ not = $ Y），具有平面内铁电和平面层面的压电性
Prediction of Magnetoelectric Multiferroic Janus Monolayers VOXY(X/Y = F, Cl, Br, or I, and X$\not=$Y) with in-plane ferroelectricity and out-of-plane piezoelectricity
论文作者
论文摘要
多功能的二维（2D）多色是设计低维多功能设备的有前途的材料。这些材料中多功能性的关键是打破空间内传输和时间反向对称性，这在同一阶段导致自发的电化和磁化。出现了新的2D材料Janus 2D材料，它以类似的原理为破坏平面外对称性的原理，以在2D材料中引起新的令人兴奋的功能，例如平面压电极化。在这项工作中，通过打破parents Multiferroics vox $ _2 $（x = f，cl，br，br，i或i）中的平面外对称性来得出了一个新的2D多效性Janus单层Voxy（X/Y = F，Cl，Cl，Br或I和X $ \ not = $ Y）。比较多表素体Vox $ _2 $的结构，磁性和铁电特性与其Janus衍生物进行了比较。我们计算了Vox $ _2 $和Voxy系列的平面内和平面压电极化，其中发现VOFCL，VOFBR，VOFI和VOCLI具有显着的平面压力电离极化。我们的理论工作预测了一系列新系列的2D多性材料，并鼓励他们进一步研究高性能纳米电子设备。
Multifunctional two-dimensional (2D) multiferroics are promising materials for designing low-dimensional multipurpose devices. The key to multifunctionality in these materials is breaking the space-inversion and the time-reversal symmetry, which results in spontaneous electric polarization and magnetization in the same phase. A new class of 2D materials, Janus 2D materials, has emerged, which works on a similar principle of breaking out-of-plane symmetry to invoke new exciting functionalities in the 2D materials, such as an out-of-plane piezoelectric polarization. In this work, a new group of 2D multiferroic Janus monolayers VOXY (X/Y = F, Cl, Br, or I, and X$\not=$Y) is derived by breaking the out-of-plane symmetry in the parent multiferroics VOX$_2$ (X = F, Cl, Br, or I). The structural, magnetic, and ferroelectric properties of multiferroics VOX$_2$ are compared with their Janus derivatives. We calculated in-plane and out-of-plane piezoelectric polarization for VOX$_2$ and VOXY series, where VOFCl, VOFBr, VOFI, and VOClI are found to have significant out-of-plane piezoelectric polarization. Our theoretical work predicts a new series of 2D multiferroic materials and encourages their further investigation for high-performance nanoelectronic devices.
