摘要 : We investigated the element-specific electronic structure of a half-metallic Weyl ferromagnet candidate Co_2FeSi film by utilizing soft-x-ray resonant photoelectron spectroscopy and first-principles calculations with and without c... 展开 We investigated the element-specific electronic structure of a half-metallic Weyl ferromagnet candidate Co_2FeSi film by utilizing soft-x-ray resonant photoelectron spectroscopy and first-principles calculations with and without considering an on-site Coulomb interaction. An Fe 2p - 3d resonant photoelectron experiment revealed that the Fe 3d states exist around 2 and 4 eV below the Fermi energy. Our calculations, based on the generalized gradient approximation without considering a Coulomb interaction at the Fe site, successfully reproduced the experimentally observed Fe 3d partial density of states. Our findings shed light on the highly controversial correlation effect of Co_2FeSi, offering valuable insights into its half metallicity and Weyl semimetallicity. 收起