We study intrinsic charge-carrier scattering mechanisms and determine their contribution to the transport properties of the two-dimensional ferromagnet Fe₃GeTe₂. We use state-of-the-art first-principles calculations combined with the model approaches to elucidate the role of the electron-phonon and electron-magnon interactions in the electronic transport. Our findings show that the charge carrier scattering in Fe₃GeTe₂ is dominated by the electron-phonon interaction, while the role of magnetic excitations is marginal. At the same time, the magnetic ordering is shown to effect essentially on the electron-phonon coupling and its temperature dependence. This leads to a sublinear temperature dependence of the electrical resistivity near the Curie temperature, which is in line with experimental observations. The room temperature resistivity is estimated to be ~ 35 μΩ ⋅ cm which may be considered as a lower intrinsic limit for monolayer Fe₃GeTe₂.

我们研究了本征载流子散射机制，并确定了它们对二维铁磁体 Fe ₃ GeTe ₂输运特性的贡献。我们使用最先进的第一原理计算结合模型方法来阐明电子-声子和电子-磁振子相互作用在电子传输中的作用。我们的研究结果表明，Fe ₃ GeTe ₂中的载流子散射主要由电子-声子相互作用主导，而磁激发的作用微乎其微。同时，磁排序被证明对电子-声子耦合及其温度依赖性有重要影响。这导致居里温度附近电阻率的亚线性温度依赖性，这与实验观察结果一致。室温电阻率估计约为 35 μΩ · cm，这可被视为单层 Fe ₃ GeTe ₂的固有下限。