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This article is cited in 14 scientific papers (total in 14 papers)
CONDENSED MATTER
LDA$^\prime$+DMFT investigation of electronic structure of
K$_{1-x}$Fe$_{2-y}$Se$_2$ superconductor
I. A. Nekrasova, N. S. Pavlova, M. V. Sadovskiiab a Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Ekaterinburg
b Institute of Metal Physics, Ural Division of the Russian Academy of Sciences
Abstract:
We investigate electronic structure of the new iron chalcogenide
high temperature superconductor K$_{1-x}$Fe$_{2-y}$Se$_2$ (hole doped
case with $x=0.24$, $y=0.28$) in the normal phase using the novel
LDA$^\prime$+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 $\pm1.5$ 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$^\prime$+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 K$_{0.76}$Fe$_{1.72}$Se$_2$.
Received: 15.11.2012
Citation:
I. A. Nekrasov, N. S. Pavlov, M. V. Sadovskii, “LDA$^\prime$+DMFT investigation of electronic structure of
K$_{1-x}$Fe$_{2-y}$Se$_2$ superconductor”, Pis'ma v Zh. Èksper. Teoret. Fiz., 97:1 (2013), 18–23; JETP Letters, 97:1 (2013), 15–19
Linking options:
https://www.mathnet.ru/eng/jetpl3321 https://www.mathnet.ru/eng/jetpl/v97/i1/p18
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Abstract page: | 352 | Full-text PDF : | 58 | References: | 53 | First page: | 14 |
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