2013/05/31 by Harald O. Jeschke, I. I. Mazin, Roser Valentí +1 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Inorganic Chemistry and Materials #Iron-based superconductors research #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.87.241105
published as Phys. Rev. B 87, 241105(R) (2013) · 4 pages, 4 figures, submitted
arxiv created 2013/05/31 · openalex publication_date 2013/06/24 · arxiv updated 2014/01/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The recently synthesized MgFeGe compound is isostructural and isoelectronic with superconducting LiFeAs. Both materials are paramagnetic metals at room temperature. Inspection of their electronic structures without spin polarization reveals hardly any difference between the two. This fact was interpreted as evidence against popular theories relating superconductivity in Fe-based materials with spin fluctuations. We show that in the magnetic domain the two compounds are dramatically different, and the fact that MgFeGe does not superconduct, is, on the contrary, a strong argument in favor of theories based on spin fluctuations.