[領域] 半導體物理

[來源] 課本習題

[題目] A semiconductor such as Si has a bandstructure about the minimum along
       [100] described approximately by

       E=E_0-Acos(ak_x)-B{cos(bk_y)+cos(bk_z)}

       What is the density-of-state effective mass associated with X minimum?


[瓶頸] 這題我想利用effective mass的公式 m*=(h_bar )^2 * (d^2E/dk^2)^-1 來解　
　　　 但我不確定要如何代入此公式　不知道X minimum的定義為何呢？？希望各位高　
       手能幫我解惑 萬分感謝!!!

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