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- W2010073574 abstract "Abstract Recently found iron-pnictide superconductor (Ba,K)Fe 2 As 2 and the heavy-fermion superconductor CeCu 2 Si 2 both have the same crystal structure. In this paper we have calculated the electronic structure of LaFe 2 Si 2 and LaFe 2 Ge 2 from first-principles. These compounds also have the same crystal structure and closely related to both of (Ba,K)Fe 2 As 2 and CeRu 2 Ge 2 . The obtained Fermi surfaces of LaFe 2 Si 2 and LaFe 2 Ge 2 resemble those of LaRu 2 Ge 2 , which are already found that they well explain the results of the dHvA experiments of CeRu 2 Ge 2 . Their density of states curves show the common feature with CaFe 2 As 2 . The density of states at the Fermi level strongly depends on the distortion of the FeX 4 tetrahedra and/or the height of the X atom from the two-dimensional Fe plane, as also found in iron-pnictide system. The electronic specific heat coefficient is 11.8 mJ/mol K 2 for LaFe 2 Si 2 and 12.5 mJ/mol K 2 for LaFe 2 Ge 2 , which is about 1/3 and 1/2 of experimental results, respectively." @default.
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- W2010073574 date "2011-11-01" @default.
- W2010073574 modified "2023-09-28" @default.
- W2010073574 title "Electronic structure of LaFe2X2 (X=Si,Ge)" @default.
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- W2010073574 doi "https://doi.org/10.1016/j.physc.2011.05.019" @default.
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