论文标题
高居里温度的预测，大型磁性晶体各向异性2D铁磁性公司$ _2 $ ge $ _2 $ _2 $ _6 $单层和多层
Prediction of High Curie Temperature, Large Magnetic Crystal Anisotropy in 2D Ferromagnetic Co$_2$Ge$_2$Te$_6$ Monolayer and Multilayer
论文作者
论文摘要
The Co$_2$Ge$_2$Te$_6$ shows intrinsic ferromagnetic (FM) order, which origins from superexchange interaction between Co and Te atoms, with higher Curie temperature ($T_c$) of 161 K. Co$_2$Ge$_2$Te$_6$ monolayer (ML) is half-metal (HM), and spin-$β$ electron is a半导体，间隙为1.311 eV。 CO $ _2 $ ge $ _2 $ _2 $ _6 $ ml趋向于面内各向异性（IPA），磁动率能量（MAE）为-10.2 mev/f.u .. co $ _2 $ _2 $ ge $ _2 $ _2 $ _2 $ _6 $ _6 $ _6 $ _6 $ ml显示出良好的动态和热稳定性。最有趣的是，双层具有独立于堆叠命令的铁磁半金属性。诺特利（Notley），多层（$ n \ ge 6 $）呈现铁磁HM，而磁性属性属性与较薄的多层层中的堆叠模式有关。此外，磁性特性取决于批量的堆叠顺序。具有多层的磁性阶由超苏式交换和弱范德华（VDW）相互作用确定。 CO $ _2 $ ge $ _2 $ te $ _6 $带有内在的铁磁，铁磁性的良好稳定性和半金属的稳定性可以帮助研究人员研究其在Spintronics中的广泛应用。
The Co$_2$Ge$_2$Te$_6$ shows intrinsic ferromagnetic (FM) order, which origins from superexchange interaction between Co and Te atoms, with higher Curie temperature ($T_c$) of 161 K. Co$_2$Ge$_2$Te$_6$ monolayer (ML) is half-metal (HM), and spin-$β$ electron is a semiconductor with gap of 1.311 eV. Co$_2$Ge$_2$Te$_6$ ML tends in-plane anisotropy (IPA), with magnetic anisotropy energy (MAE) of -10.2 meV/f.u.. Co$_2$Ge$_2$Te$_6$ ML shows good dynamical and thermal stability. Most interestingly, bilayers present ferromagnetic half-metallicity independent of the stacking orders. Notley, the multilayers ($N\ge 6$) present ferromagnetic HM, while the magnetoelectronic properties are related with the stacking patterns in thinner multilayers. Moreover, the magnetoelectronic properties are dependent on the stacking orders of bulk. The magnetic order with multilayers is determined by the super-super exchange and weak van der Waals (vdW) interaction. Co$_2$Ge$_2$Te$_6$ with intrinsic ferromagnetism, good stability of ferromagnetism and half-metallicity could help researchers to investigate its wide application in the spintronics.
