Question

Consider the Semiconductor above in Figure 1.

1. For electrons traveling along the [111] Direction which energy valley has the greatest effective mass?
2. Consider two electrons one located in the X-valley and one in the L-Valley, which one would have the greater velocity magnitude?
3. What compound semiconductor material is shown above in Figure 1, is it a direcot or indirect gap semiconductor?
   Energy 300K Eg- 1.42 eV EL = 1.71 eV Ex=1.90 eV Eso 0.34 eV , X-valley .alley L-valley <100> Wave vector Heavy holes S0 Light hotes Split-off band
   

Answer 1

L- vallar 2.m ヒー de a dk m light hotes split-off bend Curve Lv.uut → 9 caJut etteutue mans furful in Celler) ha atent velocity 2. maximumレ