Aim\ Studying the varying trend of in built electric fields on pressure tuning. Methods\ For the superlattices made of cubic materials and grown along any direction

the relations between strain and external pressure are discussed

then the varying trend of in built electric fields dependent on pressure is shown. Results and Conclusion\ For the three different superlattices

the curve of in built electric fields with pressure are plotted. In a certain range

the dependency of in built electric fields on pressure is linear relations.