Band Structure of Organic-Ion-Intercalated (EMIM)xFeSe Superconductor |
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Authors: | Lyudmila V Begunovich Maxim M Korshunov |
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Institution: | 1.Siberian Federal University, Svobodny Prospect 79, 660041 Krasnoyarsk, Russia;2.Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 660036 Krasnoyarsk, Russia |
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Abstract: | The band structure and the Fermi surface of the recently discovered superconductor (EMIM)FeSe are studied within the density functional theory in the generalized gradient approximation. We show that the bands near the Fermi level are formed primarily by Fe-d orbitals. Although there is no direct contribution of EMIM orbitals to the near-Fermi level states, the presence of organic cations leads to a shift of the chemical potential. It results in the appearance of small electron pockets in the quasi-two-dimensional Fermi surface of (EMIM)FeSe. |
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Keywords: | band structure DFT Iron-based superconductors |
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