Localization length as a function of normalized random potential strength for different incident angles and in pseudospin-1 and -1/2 systems subjected to 1D disordered potentials. The results are calculated using the transfer-matrix method (TMM). (a) Localization length for three different incident angles in pseudospin-1 systems. (b) Localization length for three different values of in pseudospin-1 systems. (c) Same as (a), but for pseudospin-1/2. (d) Same as (b), but for pseudospin-1/2. The localization lengths at small are fitted by the dotted lines, showing a behavior. Adapted from .