Abstract
Synchrotron-radiation-excited angle-resolved photoemission spectra for the (100) and (111) faces of AuAl 2 and the (111) face of PtGa 2 are presented, along with derived experimental dispersion relations. These bands are compared with those obtained from the first-principles theoretical band-structure calculations. The total densities of states at the Fermi energy for these two materials are compared with those obtained from the specific-heat measurements. The energy variations of Au and Pt 5d bands for AuAl 2 and PtGa 2, respectively, show atomic-like behavior in the photon-energy range of 80–220 eV.
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