AN AUGMENTED-SPACE RECURSION IRE THE KAPPA-SPACE REPRESENTATION

We present here a technique for the calculation of configurationally a veraged quantities in the reciprocal Ic-space representation, such as the spectral function and complex band structures. We apply the techni que to AgPd alloys in conjunction with the tight-binding linearized mu ffin-tin orbital basis. We also indicate why the same technique is ide al for application to the more accurate screened KKR and allows us to go beyond the single-site coherent potential approximation and include multi-site effects such as short-ranged ordering and local lattice di stortions due to size mismatch of the constituent atoms.