Properties of KCo${}_2$As${}_2$ and Alloys with Fe and Ru: Density Functional Calculations

Abstract

Electronic structure calculations are presented for KCo${}_2$As${}_2$ and alloys with KFe${}_2$As${}_2$ and KRu${}_2$As${}_2$. These materials show electronic structures characteristic of coherent alloys, with a similar Fermi surface structure to that of the Fe-based superconductors, when the $d$ electron count is near six per transition metal. However, they are less magnetic than the corresponding Fe compounds. These results are discussed in relation to superconductivity.

5 pages

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• Superconductivity in SrFe_(2-x)Co_xAs_2: Internal Doping of the Iron Arsenide Layers
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• Pseudorandom Number Generators and the Square Site Percolation Threshold
• X-ray spectra and electronic structure of FeAs superconductors

Cited by in corpus (2)

• Single Crystal Growth and Characterization of the Iron-Based Superconductor KFe2As2 Synthesized by KAs Flux Method
• Electronic structure of $A$Co${}_2$As${}_2$ ($A=$ Ca, Sr, Ba, Eu) studied using angle-resolved photoemission spectroscopy and theoretical calculations