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

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dc.creatorRotter, Marianne
dc.creatorPangerl, Michael
dc.creatorTegel, Marcus
dc.creatorJohrendt, Dirk
dc.date2008-07-25
dc.date2008-08-12
dc.date.accessioned2026-07-07T10:05:09Z
dc.date.available2026-07-07T10:05:09Z
dc.descriptionWe report on doping dependencies of structural parameters and superconducting transition temperatures in the solid solution (Ba1-xKx)Fe2As2. As the main effect of doping on the crystal structure, we find linear decreasing As-Fe-As bond angles and Fe-Fe distances, equivalent to an elongation of the FeAs4 tetrahedra along [001]. The structural changes are intimately coupled to the electronic states at the Fermi level, because the most relevant Fe-3dx2-y2 orbitals are strongly affected by the As-Fe-As bond angle. Superconductivity is present over the whole doping range in (Ba1-xKx)Fe2As2 with a maximum Tc of 38 K at x ~ 0.4. The superconducting transitions in the orthorhombic compounds (Ba0.9K0.1)Fe2As2 (Tc ~ 3 K) and (Ba0.8K0.2)Fe2As2 (Tc ~ 25 K) is strong evidence for the coexistence of superconductivity with the structurally distorted and potentially magnetically ordered state in the BaFe2As2 family of iron arsenide superconductors.
dc.description4 pages, 6 figures, text revised, one figure added, accepted for publication in Angew. Chem. Int. Ed
dc.identifierhttps://arxiv.org/abs/0807.4096
dc.identifierhttp://arxiv.org/abs/0807.4096
dc.identifierAngew. Chem. Int. Ed. 2008, 47, 7949-7952
dc.identifierdoi:10.1002/anie.200803641
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/169929
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleSuperconductivity and Crystal Structures of (Ba1-xKx)Fe2As2 (x = 0 - 1)
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