Monte Carlo simulations of a one-dimensional -- test structure show that the temperature components parallel () and normal () to the direction of the current flow are quite different (Fig. 5.4). In particular, the transverse temperature component is smaller than the longitudinal component [64, Fig.7]. This encourages the derivation of a transport model which takes an anisotropic distribution function into account.
M. Gritsch: Numerical Modeling of Silicon-on-Insulator MOSFETs PDF