Effective masses of the insulator materials

[islam.hashem]

What are the effective mass of conduction band (mc) and valence band (mv) of insulator material Al2O3. Kindly tell me your reference

 

[ZapperZ]

1. Do you know the definition of effective mass?

2. Can you find the band structure of Al2O3?

Zz.

 

[islam.hashem]

i know that the effective mass is calculated from the E-K diagram (inversely proportional to the curvature) and E-K diagram is calculated for crystalline structure only not amorphous. I do not know whether Al2O3 was crystalline or amorphous. Thanks.

 

[ZapperZ]

i know that the effective mass is calculated from the E-K diagram (inversely proportional to the curvature) and E-K diagram is calculated for crystalline structure only not amorphous. I do not know whether Al2O3 was crystalline or amorphous. Thanks.

Look up "sapphire". That's a single-crystal Al2O3.

Zz.

 

[islam.hashem]

Thanks for your reply. Do you know its effective masses mc and mv?. Thanks!