Properties of KCo$_2$As$_2$ and Alloys with Fe and Ru: Density Functional Calculations
arXiv:0904.1607 · doi:10.1103/PhysRevB.79.174520
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