1.  

The current flow in a Schottky barrier, we assumed that the current was due to thermionic emission only. This is based on classical physics where it is assumed that only particles with energy greater than a barrier can pass through. Consider a W-n-type GaAs Schottky barrier in which the Schottky barrier triangular potential is described by a field of 105 V/cm. The Schottky barrier height is 0.8 V. Calculate the tunneling probability through the triangular barrier as a function of electron energy from E = 0.4 eV to E = 0.8 eV. The tunneling current increases the Schottky reverse current above the value obtained by thermionic current considerations.