Experimental and theoretical study of the electronic structure of PtGa2 -: art. no. 155105

Synchrotron-radiation-excited angle-resolved photoemission and x-ray-absorption spectra for the (111) face of PtGa2 are presented, along with derived experimental dispersion relations. These bands are compared with those obtained from a theoretical hand-structure calculation. The x-ray-absorption near-edge spectra agree with the calculated site- and symmetry-decomposed partial density-of-states curves, and electrons transfer from Pt to Ga in forming the PtGa2 compound. Extended x-ray-absorption fine-structure spectra of PtGa2 are analyzed to yield its structural parameters. The energy variation of the Pt 5d bands for PtGa2 shows atomiclike behavior in the photon energy range of 80 to 220 eV.