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- W2051211875 abstract "The electronic structure and magnetic properties of LiFeAs and FeSe have been studied using hybrid-exchange density functional theory. The total energies for a unit cell in LiFeAs and FeSe with different spin states including non-magnetic and spin-2 are calculated. The spin-2 configuration has the lower energy for both LiFeAs and FeSe. The computed anti-ferromagnetic exchange interactions between spins on the nearest (next nearest) neighbouring Fe atoms in LiFeAs and FeSe are approximately 14 (17) meV and 6 (13) meV, respectively. The total energies of the checkerboard and stripe-type anti-ferromagnetic ordering for LiFeAs and FeSe are compared, yielding that for LiFeAs the checkerboard is lower whereas for FeSe the stripe-type is lower. However, owing to the fact that the exchange interaction of the next nearest neighbour is larger than that of the nearest one, which means that the collinear ordering might be the ground state. These results are in agreement with the previous theoretical calculations and experiments. Especially the calculations for LiFeAs indicate a co-existence of conducting d-bands at the Fermi surface and d-orbital magnetism far below the Fermi surface. The theoretical results presented here might be useful for the experimentalists working on the electronic structure and magnetism of iron-based superconductors." @default.
- W2051211875 created "2016-06-24" @default.
- W2051211875 creator A5006623437 @default.
- W2051211875 date "2013-05-01" @default.
- W2051211875 modified "2023-10-17" @default.
- W2051211875 title "Modelling the electronic structure and magnetic properties of LiFeAs and FeSe using hybrid-exchange density functional theory" @default.
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- W2051211875 doi "https://doi.org/10.1016/j.ssc.2013.03.003" @default.
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