Electron transport and scattering mechanisms in ferromagnetic monolayer Fe3GeTe2

• Published in: NPJ 2D materials and applications Vol. 7; no. 1; pp. 52 - 7
• Main Authors: Badrtdinov, Danis I., Pushkarev, Georgy V., Katsnelson, Mikhail I., Rudenko, Alexander N.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 07.08.2023; Nature Publishing Group; Nature Portfolio
• Subjects: 639/766/119/2793; 639/766/119/997; Chemistry and Materials Science; Crystal structure; Curie temperature; Current carriers; Electrical resistivity; Electron phonon interactions; Electron transport; Electrons; Energy consumption; Ferromagnetism; First principles; Magnons; Materials Science; Monolayers; Nanotechnology; Phonons; Room temperature; Scattering; Surfaces and Interfaces; Temperature dependence; Thin Films; Transport properties
• ISSN: 2397-7132; 2397-7132
• DOI: 10.1038/s41699-023-00413-0

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 ~ 35 μ Ω ⋅ cm which may be considered as a lower intrinsic limit for monolayer Fe 3 GeTe 2 .