Rigid Band - sv3pt5 #165

The Rigid-Band Model is one of the models used to describe the behavior of metal alloys. In some cases the model is even used for non-metal alloys such as Si alloys. According to the RBM the shape of the constant energy surfaces and curve of density of states of the alloy are the same as those of the solvent metal under the following conditions:The excess charge of the solute atoms localizes around them. The mean free path of the electrons is much greater than the lattice spacing of the alloy. The electron states of interest in the pure solvent are all in one energy band, which is greatly separated in energy from the other bands.