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  • Title: Electronic Structure of Above-Room-Temperature van der Waals Ferromagnet Fe3GaTe2.
    Author: Lee JE, Yan S, Oh S, Hwang J, Denlinger JD, Hwang C, Lei H, Mo SK, Park SY, Ryu H.
    Journal: Nano Lett; 2023 Dec 27; 23(24):11526-11532. PubMed ID: 38079244.
    Abstract:
    Fe3GaTe2, a recently discovered van der Waals ferromagnet, demonstrates intrinsic ferromagnetism above room temperature, necessitating a comprehensive investigation of the microscopic origins of its high Curie temperature (TC). In this study, we reveal the electronic structure of Fe3GaTe2 in its ferromagnetic ground state using angle-resolved photoemission spectroscopy and density functional theory calculations. Our results establish a consistent correspondence between the measured band structure and theoretical calculations, underscoring the significant contributions of the Heisenberg exchange interaction (Jex) and magnetic anisotropy energy to the development of the high-TC ferromagnetic ordering in Fe3GaTe2. Intriguingly, we observe substantial modifications to these crucial driving factors through doping, which we attribute to alterations in multiple spin-splitting bands near the Fermi level. These findings provide valuable insights into the underlying electronic structure and its correlation with the emergence of high-TC ferromagnetic ordering in Fe3GaTe2.
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