Electron transport and scattering mechanisms in ferromagnetic monolayer Fe${}_3$GeTe${}_2$

Abstract

We study intrinsic charge-carrier scattering mechanisms and determine their contribution to the transport properties of the two-dimensional ferromagnet Fe${}_3$GeTe${}_2$. 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 Fe${}_3$GeTe${}_2$ 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 $\sim$35 $\mu \Omega \cdot$cm which may be considered as an intrinsic limit for monolayer Fe${}_3$GeTe${}_2$.

10 pages, 8 figures

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Cited by in corpus (3)

• An effective spin model on the honeycomb lattice for the description of magnetic properties in two-dimensional Fe${}_3$GeTe${}_2$
• Electronic structures and magnetism in van der Waals flat-band material Ni${}_3$GeTe${}_2$
• Phonon-induced renormalization of exchange interactions in metallic two-dimensional magnets