The valence-band offsets of such systems are calculated by frozen potential method and their Joint density of states has been computed by tetrahedron method.
在此基础上，用冻结势方法计算了该超晶格系统的价带带阶；用四面体方法计算了该系统的联合态密度。
2
When an electron leaps into the conduction band, it leaves behind a hole in the valenceband.
当一个电子跃迁到传导带，它会在价带留下一个“凹陷”。
3
Most optical oscillator strengths for the transitions between valenceband and conduction band are nearly equal to zero.