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• W2899409478 abstract "In order to investigate the electronic properties of the semiconducting van der Waals ferromagnet $mathrm{C}{mathrm{r}}_{2}mathrm{G}{mathrm{e}}_{2}mathrm{T}{mathrm{e}}_{6}$ (CGT), where ferromagnetic layers are bonded through van der Waals forces, we have performed angle-resolved photoemission spectroscopy measurements and density-functional theory $(mathrm{DFT}+U)$ calculations. The valence-band maximum at the $mathrm{ensuremath{Gamma}}$ point is located $ensuremath{sim}0.2phantom{rule{0.16em}{0ex}}mathrm{eV}$ below the Fermi level, consistent with the semiconducting property of CGT. Comparison of the experimental density of states with the DFT calculation has suggested that Coulomb interaction between the Cr $3d$ electrons ${U}_{mathrm{eff}}ensuremath{sim}1.1phantom{rule{0.16em}{0ex}}mathrm{eV}$. The $mathrm{DFT}+U$ calculation indicates that magnetic coupling between Cr atoms within the layer is ferromagnetic if Coulomb ${U}_{mathrm{eff}}$ is smaller than 3.0 eV and that the interlayer coupling is ferromagnetic below ${U}_{mathrm{eff}}ensuremath{sim}1.0phantom{rule{0.16em}{0ex}}mathrm{eV}$. We therefore conclude that, for ${U}_{mathrm{eff}}$ deduced by the experiment, the intralayer Cr-Cr coupling is ferromagnetic and the interlayer coupling is near the boundary between ferromagnetic and antiferromagnetic, which means experimentally deduced ${U}_{mathrm{eff}}$ is consistent with the theoretical ferromagnetic condition." @default.
• W2899409478 created "2018-11-09" @default.
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• W2899409478 date "2019-04-01" @default.
• W2899409478 modified "2023-10-18" @default.
• W2899409478 title "Coulomb-interaction effect on the two-dimensional electronic structure of the van der Waals ferromagnet <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi mathvariant=normal>C</mml:mi><mml:msub><mml:mi mathvariant=normal>r</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant=normal>G</mml:mi><mml:msub><mml:mi mathvariant=normal>e</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant=normal>T</mml:mi><mml:msub><mml:mi mathvariant=normal>e</mml:mi><mml:…" @default.
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• W2899409478 doi "https://doi.org/10.1103/physrevb.99.161401" @default.
• W2899409478 hasPublicationYear "2019" @default.
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