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Ravian
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can we estimate effective masses of electron and hole from the band structure if yes how? can somebody explain with reference to Si band structure?
Ravian said:can we estimate effective masses of electron and hole from the band structure if yes how? can somebody explain with reference to Si band structure?
fk08 said:dear ravian,
yes, you can extract the effective mass from your bandstructure.
I you have a bandstructure E(k) you can extract energy distribution curves (take the program IGOR for instance) for the momentum range of interest, e.g. E(k1),E(k2) and so on.
These photoemission peaks you can then fit with a voigt function. From this fit you can
extract the peak maxima and plot them versus the crystal momentum. In a last step you can fit these data points assuming a dispersion E = hbar^2*k^2/(2m*)
Effective mass estimation is a method used in physics to determine the effective mass of particles or bodies in a given system. It is an important concept in solid-state physics and is used to describe the behavior of electrons in a crystal lattice.
Effective mass is typically estimated through experimental measurements or theoretical calculations. Experimental methods involve measuring the response of a particle or body to an external force, while theoretical methods use mathematical models to predict the effective mass based on known parameters.
Effective mass is important because it allows us to simplify the complex behavior of particles in a system and make predictions about their properties and interactions. It is also crucial in understanding the electrical and thermal conductivity of materials, as well as their optical and magnetic properties.
The effective mass of a particle is affected by several factors, including its momentum, energy, and the strength of the interaction with its surroundings. It can also be influenced by external factors such as temperature, pressure, and the presence of impurities or defects in the material.
Effective mass has numerous practical applications in fields such as semiconductor technology, where it is used to design and optimize electronic devices. It is also used in the development of new materials for various applications, such as solar cells and computer memory devices.