1. The problem statement, all variables and given/known data There has been created a heterojunction of two different semiconductors, Si and GaP. I am to determine the valence- and conduction band offset with Tershoff's model. 2. Relevant equations The problem is that I can't find the relevant model. Therefore, I cannot find the relevant equations. 3. The attempt at a solution My first step is to draw the band bending. (Not posted here) And, then find the relevant data for the different materials. Such as the indirect bandgap, spin-orbital splitting... If they are needed I am happy to post them. Just let me know. Thank you!