Electronic band structure, Fermi surface, and elastic properties of new   4.2K superconductor SrPtAs from first-principles calculations
  The hexagonal phase SrPtAs (s.g. P6/mmm; #194) with a honeycomb lattice structure very recently was declared as a new low-temperature (TC ~ 4.2K) superconductor. Here by means of first-principles calculations the optimized structural parameters, electronic bands, Fermi surface, total and partial densities of states, inter-atomic bonding picture, independent elastic constants, bulk and shear moduli for SrPtAs were obtained for the first time and analyzed in comparison with the related layered superconductor SrPt2As2. 
I.R. Shein and A.L. Ivanovskii
cond-mat.supr-con cond-mat.mtrl-sci