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This article is cited in 24 scientific papers (total in 24 papers)
SCIENTIFIC SUMMARIES
Electronic structure of new iron-based superconductors: From pnictides to chalcogenides and other similar systems
I. A. Nekrasova, M. V. Sadovskiib 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:
The electronic spectra of new iron-based high-temperature superconductors and a number of other chemically similar compounds have been discussed and compared with the focus on iron chalcogenide K$_{1-x}$Fe$_{2-y}$Se$_2$ and isostructural pnictide BaFe$_2$As$_2$ (122). It has been shown that the Fermi surfaces in K$_{1-x}$Fe$_{2-y}$Se$_2$ are significantly different from those in pnictides. The LDA + DMFT and LDA’ + DMFT calculations have demonstrated that the effect of electron correlations in K$_{1-x}$Fe$_{2-y}$Se$_2$ on the electronic structure is much stronger than that in the most studied 122 system. The electronic structure of several multiband superconductors similar in chemical composition to iron-based high-temperature superconductors, but having a relatively low $T_c$ value (such as SrPt$_{2}$As$_{2}$, APt$_{3}$P (A = Sr, Ca, La), and (Sr, Ca)Pd$_2$As$_2$), and the non-superconducting compound BaFe$_2$Se$_3$ has also been discussed. It has been shown that the electronic structure of these systems is significantly different from previously studied iron pnictides and chalcogenides. The $T_c$ value in these systems can be understood within the simple Bardeen–Cooper–Schrieffer model.
Received: 21.04.2014
Citation:
I. A. Nekrasov, M. V. Sadovskii, “Electronic structure of new iron-based superconductors: From pnictides to chalcogenides and other similar systems”, Pis'ma v Zh. Èksper. Teoret. Fiz., 99:10 (2014), 687–703; JETP Letters, 99:10 (2014), 598–612
Linking options:
https://www.mathnet.ru/eng/jetpl3743 https://www.mathnet.ru/eng/jetpl/v99/i10/p687
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Abstract page: | 369 | Full-text PDF : | 100 | References: | 51 | First page: | 11 |
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