What's the condition for absence of interband transition

Thread starter Elahe
Start date Oct 16, 2015
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In summary, the condition for absence of interband transition is that the energy of the incident photon must be less than the band gap energy of the material. The band gap energy is important because it represents the minimum amount of energy required for an electron to jump from the valence band to the conduction band, thus allowing for interband transition to occur. Interband transition can only occur in materials that have a band structure, such as semiconductors and insulators, and not in metals. The band gap energy varies among different materials and can be controlled through techniques such as doping, alloying, and strain engineering. These methods can change the electronic and atomic structure of the material, thus altering its band gap energy.

Oct 16, 2015

Elahe

what's the condition for absence of interband transition in uniform electric or magnetic fields?

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Oct 16, 2015

BigJDubs

In a uniform electric or magnetic field, interband transitions will not occur if the energy gap between the valence and conduction bands is greater than the field strength.

What's the condition for absence of interband transition?

The condition for absence of interband transition is that the energy of the incident photon must be less than the band gap energy of the material.

Why is the band gap energy important in determining interband transition?

The band gap energy is important because it represents the minimum amount of energy required for an electron to jump from the valence band to the conduction band, thus allowing for interband transition to occur.

Can interband transition occur in all materials?

No, interband transition can only occur in materials that have a band structure, such as semiconductors and insulators. Metals, which have a continuous band structure, do not experience interband transition.

How does the band gap energy vary among different materials?

The band gap energy varies among different materials and can range from less than 1 eV to several eV. The specific value of the band gap energy is determined by the atomic and electronic structure of the material.

Is there a way to control the band gap energy of a material?

Yes, the band gap energy of a material can be controlled through techniques such as doping, alloying, and strain engineering. These methods can change the electronic and atomic structure of the material, thus altering its band gap energy.