Crystal and Electronic Structure of Ternary Bismuthides BaTM_1.8Bi₂ (TM = Au, Ag) with a New Variation of the BaAu₂Sb₂ Structure Type

Recently discovered bismuthides with the BaAu2Sb2 structure type demonstrate interesting properties and electronic structures. Here, we report successful crystal growth, crystal structure, band structure calculations, and DOS for BaAg1.8Bi2 and BaAu1.8Bi2. Grown crystals were characterized by a combination of single crystal X-ray diffraction and EDX spectroscopy. Both compounds crystallized in a new variation of BaAu2Sb2 structure type and demonstrated metallic properties according to our DFT calculations.