Lattice Dynamics and Phonon Dispersion of the van der Waals Layered Ferromagnet Fe3GaTe2

• DOI: 10.1021/acs.nanolett.4c06408
• Publication Date: 2025-03-07T16:46:16Z
• Authors: Xia Chen; Xi Zhang; Wenjie He; Yu Li; Jiating Lu; Dinghua Yang; Deren Li; Li Lei; Yong Peng; Gang Xiang
• Keywords: Lattice (music)

Despite the tremendous progress in spintronic studies of van der Waals (vdW) room-temperature ferromagnet Fe3GaTe2, much less effort has been spent on studying its lattice dynamics and possible interaction with degrees freedom. In this work, by combining Raman spectroscopy a wide range pressures (atmospheric pressure ∼19.5 GPa) temperature (80-690 K) first-principles calculations, we systematically studied phonon dispersion Fe3GaTe2. Our results show that energies Fe3GaTe2 located at 126.0 143.5 cm-1 originate from anharmonic E2g2 harmonic A1g1 vibration modes, respectively. Furthermore, first spin-phonon coupling vdW is observed strength ∼0.81 300 K, identifying anomalies both energy full width half-maximum below Curie findings are valuable for fundamental applied materials under variable conditions.