Effective masses of the insulator materials

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SUMMARY

The effective masses of the conduction band (mc) and valence band (mv) for the insulator material Al2O3, commonly known as sapphire, are derived from the E-K diagram, which is applicable only to crystalline structures. The effective mass is inversely proportional to the curvature of the E-K diagram. The discussion confirms that Al2O3 is a crystalline material, which is essential for accurate calculations of effective mass. However, specific values for mc and mv were not provided in the discussion.

PREREQUISITES
  • Understanding of effective mass in semiconductor physics
  • Knowledge of E-K diagrams and their significance
  • Familiarity with crystalline versus amorphous materials
  • Basic concepts of band structure in insulators
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  • Research the effective mass calculations for Al2O3 using E-K diagrams
  • Explore the band structure of Al2O3 in detail
  • Study the properties of sapphire as a single-crystal material
  • Investigate the implications of effective mass on electronic properties of insulators
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Materials scientists, physicists, and engineers involved in semiconductor research, particularly those focusing on insulator materials and their electronic properties.

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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