论文标题
在磁性滑动铁电材料中调整大量光伏效应
Tailoring Bulk Photovoltaic Effects in Magnetic Sliding Ferroelectric Materials
论文作者
论文摘要
与晶体对称性密切相关的大量光伏效应已在各种非磁性材料中进行了广泛的研究，尤其是具有可切换电偏振的铁电气。为了进一步设计对称性，可以诉诸具有额外磁性自由度的自旋偏振系统。在这里，我们研究了VSE2，FECL2和CRI3双层中示出的二维磁滑铁（MSFE）系统中的大量光伏效应。这些系统中的过渡金属元素表现出内在的自旋极化，两层之间的堆叠不匹配产生了有限的平面外电偶极子。通过对称分析和第一原理的计算，我们表明，可以通过其磁性和平面外偶极矩来有效调节光诱导的平面内光伏电流。从互惠空间中的量子公制分布阐明了基本机制。 MSFE的制造和操纵的便利性保证了实用的光电应用。
The bulk photovoltaic effect that is intimately associated with crystalline symmetry has been extensively studied in various nonmagnetic materials, especially ferroelectrics with a switchable electric polarization. In order to further engineer the symmetry, one could resort to spin-polarized systems possessing an extra magnetic degree of freedom. Here, we investigate the bulk photovoltaic effect in two-dimensional magnetic sliding ferroelectric (MSFE) systems, illustrated in VSe2, FeCl2, and CrI3 bilayers. The transition metal elements in these systems exhibit intrinsic spin polarization, and the stacking mismatch between the two layers produce a finite out-of-plane electric dipole. Through symmetry analyses and first-principles calculations, we show that photoinduced in-plane bulk photovoltaic current can be effectively tuned by their magnetic order and the out-of-plane dipole moment. The underlying mechanism is elucidated from the quantum metric dipole distribution in the reciprocal space. The ease of the fabrication and manipulation of MSFEs guarantee practical optoelectronic applications.
