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guedman
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i would like to know all the details about the band structure in a semiconductor and in particular
what we call :
yours sincerly
guedman
what we call :
yours sincerly
guedman
Subbands in semiconductor band structure refer to the quantized energy states that exist within the conduction and valence bands of a semiconductor material. These subbands are formed due to the periodic potential created by the crystal lattice of the material.
Subbands are formed through the process of quantum confinement, where the electrons in the material are confined to a smaller space due to the presence of a potential barrier. This results in the energy levels of the electrons becoming discrete, creating subbands within the conduction and valence bands.
The presence of subbands in semiconductor band structure plays a crucial role in determining the electronic properties of the material. The number and distribution of subbands can affect the conductivity, carrier mobility, and other important characteristics of the material.
External factors such as temperature, strain, and electric fields can influence the formation and behavior of subbands in semiconductor band structure. For example, an increase in temperature can lead to thermal excitation of electrons into higher subbands, while the application of strain can shift the energy levels of the subbands.
Yes, subbands can be engineered in semiconductor materials through various techniques such as quantum well structures, quantum dots, and strained layers. These methods involve controlling the dimensions and composition of the material to manipulate the formation and energy levels of the subbands for specific applications.