Superconductivity and Crystal Structures of (Ba1−xKx)Fe2As2 (x=0–1)

2008/07/31 by Marianne Rotter, Michael Pangerl, Marcus Tegel +1 · 4 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1002/anie.200803641

published as Angew. Chem. Int. Ed. 2008, 47, 7949-7952 · 4 pages, 6 figures, text revised, one figure added, accepted for publication in Angew. Chem. Int. Ed

arxiv created 2008/08/12 · openalex publication_date 2008/09/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Doping improves performance: Iron arsenides (Ba1−xKx)Fe2As2 with the ThCr2Si2-type structure exhibit superconductivity at 3–38 K depending on the potassium doping level. Superconductivity occurs before the structural distortion of the parent compound BaFe2As2 (x=0) is completely suppressed by doping (see phase diagram; • critical temperature, ○ phase-transition temperature). Doping decreases the bond angles in the iron arsenide layers, suggesting a strong coupling of structural and electronic degrees of freedom.

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