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- W3098992448 abstract "We investigate electronic structure of the new iron chalcogenide high temperature superconductor K1−x Fe2−y Se2 (hole doped case with x = 0.24, y = 0.28) in the normal phase using the novel LDA’+DMFT computational approach. We show that this iron chalcogenide is more correlated in a sense of bandwidth renormalization (energy scale compression by factor about 5 in the interval ±1.5 eV), than typical iron pnictides (compression factor about 2), though the Coulomb interaction strength is almost the same in both families. Our results for spectral densities are in general agreement with recent ARPES data on this system. It is found that all Fe-3d(t 2g ) bands crossing the Fermi level have equal renormalization, in contrast to some previous interpretations. Electronic states at the Fermi level are of predominantly xy symmetry. Also we show that LDA’+DMFT results are in better agreement with experimental spectral function maps, than the results of conventional LDA+DMFT. Finally we make predictions for photoemission spectra lineshape for K0.76Fe1.72Se2." @default.
- W3098992448 created "2020-11-23" @default.
- W3098992448 creator A5054265874 @default.
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- W3098992448 date "2013-03-01" @default.
- W3098992448 modified "2023-10-12" @default.
- W3098992448 title "LDA’+DMFT investigation of electronic structure of K1 − x Fe2 − y Se2 superconductor" @default.
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- W3098992448 doi "https://doi.org/10.1134/s0021364013010074" @default.
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