Complex sentence: When a heterojunction is formed by two different semiconductors, a quantum well can be fabricated due to difference in band structurerder to calculate the static energy levels within the achieved quantum well, understanding variation or mismatch of the effective mass across the heterojunction becomes substantial.
Split into simpler sentences: When a heterojunction is formed by two different semiconductors, a quantum well can be fabricated due to difference in band structure. In order to calculate the static energy levels within the achieved quantum well, understanding variation or mismatch of the effective mass across the heterojunction becomes substantial.