Why MgFeGe is not a superconductor

Harald Olaf Jeschke, I. I. Mazin, Roser Valentí

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8 Citations (Scopus)


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.

Original languageEnglish
Article number241105
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number24
Publication statusPublished - Jun 24 2013
Externally publishedYes


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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