A relativistic theory of photoemission from crystalline metals and alloys

The authors develop a theory of energy-, angle- and spin-resolved photoemission spectroscopy of non-magnetic crystalline metals and their alloys on the basis of relativistic quantum mechanics. In particular, the theory is applicable to cases of more than one atom per unit cell and random solid solutions. They illustrate it by explicit first-principles calculations for pure Cu, Ag and Au, ordered Cu 3 Au and disordered Cu 0.75 Au 0.25 .