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• W2028661337 endingPage "125601" @default.
• W2028661337 startingPage "125601" @default.
• W2028661337 abstract "In this paper we investigate the electronic and magnetic properties of K$_{x}$Fe$_{2-y}$Se$_{2}$ materials at different band fillings utilizing the multi-orbital Kotliar-Ruckenstein's slave-boson mean field approach. We find that at three-quarter filling, corresponding to KFe$_{2}$Se$_{2}$, the ground state is a paramagnetic bad metal. Through band renormalization analysis and comparison with the angle-resolved photoemission spectra data, we identify that KFe$_{2}$Se$_{2}$ is also an intermediate correlated system, similar to iron-pnictide systems. At two-third filling, corresponding to the Fe$^{2+}$-based systems, the ground state is a striped antiferromagnetic (SAFM) metal with spin density wave gap partially opened near the Fermi level. In comparison, at half filling case, corresponding to the Fe$^{3+}$-based compounds, besides SAFM, a $Nacute{e}el$ antiferromagnetic metallic ground state without orbital ordering is observed in the intermediate correlation range, and an orbital selective Mott phase (OSMP) accompanied with an intermediate-spin to high-spin transition is also found. These results demonstrate that the band filling and correlation control the electronic state, Fermi surface topology and magnetism in K$_{x}$Fe$_{2-y}$Se$_{2}$." @default.
• W2028661337 created "2016-06-24" @default.
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• W2028661337 date "2013-02-19" @default.
• W2028661337 modified "2023-09-25" @default.
• W2028661337 title "Band filling and correlation controlling electronic properties and magnetism in K_<i>x</i>Fe_2−<i>y</i>Se₂: a slave boson study" @default.
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• W2028661337 doi "https://doi.org/10.1088/0953-8984/25/12/125601" @default.
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• W2028661337 hasPublicationYear "2013" @default.
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