Effective masses of the insulator materials

islam.hashem
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What are the effective mass of conduction band (mc) and valence band (mv) of insulator material Al2O3. Kindly tell me your reference
 
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1. Do you know the definition of effective mass?

2. Can you find the band structure of Al2O3?

Zz.
 
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.
 
islam.hashem said:
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.
 
Thanks for your reply. Do you know its effective masses mc and mv?. Thanks!
 

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