RT Journal Article
T1 Temperature and Thickness Dependence of the Thermal Conductivity in 2D Ferromagnet Fe3GeTe2
A1 Santos Claro, Marcel
A1 Corral Sertal, Javier
A1 Otero Fumega, Adolfo
A1 Blanco Canosa, Santiago
A1 Suárez Rodríguez, Manuel
A1 Hueso Arroyo, Luis E.
A1 Pardo Castro, Víctor
A1 Rivadulla Fernández, José Francisco
K1 Thermal conductivity
K1 2D materials
K1 Ferromagnetism
K1 Thermoreflectance
AB The emergence of symmetry-breaking orders such as ferromagnetism and the weak interlayer bonding in van der Waals materials offers a unique platform to engineer novel heterostructures and tune transport properties like thermal conductivity. Here, we report the experimental and theoretical study of the cross-plane thermal conductivity, κ⊥, of the van der Waals two-dimensional (2D) ferromagnet Fe3GeTe2. We observe an increase in κ⊥ with thickness, indicating a diffusive transport regime with ballistic contributions. These results are supported by the theoretical analyses of the accumulated thermal conductivity, which show an important contribution of phonons with mean free paths between 10 and 200 nm. Moreover, our experiments show a reduction of κ⊥ in the low-temperature ferromagnetic phase occurring at the magnetic transition. The calculations show that this reduction in κ⊥ is associated with a decrease in the group velocities of the acoustic phonons and an increase in the phonon–phonon scattering of the Raman modes that couple to the magnetic phase. These results demonstrate the potential of van der Waals ferromagnets for thermal transport engineering
PB ACS
SN 1944-8244
YR 2023
FD 2023
LK http://hdl.handle.net/10347/33247
UL http://hdl.handle.net/10347/33247
LA eng
NO ACS Appl. Mater. Interfaces 2023, 15, 42, 49538–49544
NO This work has received financial support from Ministerio de Economía y Competitividad (Spain), projects PID2019-104150RB-I00 and PID2021-122609NB-C22, Xunta de Galicia (Centro singular de investigación de Galicia accreditation 2019–2022, ED431G 2019/03), and the European Union (European Regional Development Fund-ERDF). We thank the CESGA (Centro de Supercomputación de Galicia for the computational facilities. A.O.F. acknowledges the Academy of Finland Project no. 349696. M.S.C. acknowledges the Maria Zambrano fellowship and NextGenerationEU program. M.S.-R. acknowledges support from La Caixa Foundation (no. 100010434) with code LCF/BQ/DR21/11880030. S.B.-C. acknowledges the MINECO project: PID2021-122609NB-C21
DS Minerva
RD 22 abr 2026