Metals and superconductors

Band structure of new layered arsenides SrRu$_2$As$_2$ and BaRu$_2$As$_2$

I. R. Shein, A. L. Ivanovskii

Institute of Solid State Chemistry, Urals Branch of the Russian Academy of Sciences, Ekaterinburg

Abstract: This paper reports on the results of the ab initio FLAPW-GGA band structure calculations for two new layered phases SrRu$_2$As$_2$ and BaRu$_2$As$_2$, which are isostructural and isoelectronic to the known tetragonal (Ca,Sr,Ba)Fe$_2$As$_2$ basis phases of the FeAs superconductor family. The energy bands, densities of states, topology of the Fermi surface, low-temperature electron specific heats, and molar Pauli paramagnetic susceptibilities of SrRu$_2$As$_2$ and BaRu$_2$As$_2$ are determined for the first time and discussed in comparison with those for BaFe$_2$As$_2$ and BaRh$_2$As$_2$.

Received: 28.04.2009

 English version: Physics of the Solid State, 2010, 52:1, 6–11

Bibliographic databases:

•