Physics for Electronics Engineering: Unit V: Nano Devices
Significance Between Fermi Energy and Volume of the Material
Nano Devices
It is defined as the highest energy level occupied by the electron at OK in metal.
SIGNIFICANCE BETWEEN FERMI ENERGY AND VOLUME OF THE MATERIAL
Fermi
Energy
It
is defined as the highest energy level occupied by the electron at OK in metal.
In terms of distribution of energy, solids have wide energy bands whereas atoms have thin, discrete energy states.
Now
rearranging eqn (4) for the Fermi energy of a conductor, we have
Here, ne is the only variable and all the other terms are constants. Thus, Fermi energy of the conductor just depends on the number of free electrons per unit volume ie., electron density ne.
As
the electron density is a property of the material, Fermi energy does not vary
with the material's size. EF is the same for a particle of a solid
as it is for a solid itself.
This
is the case applicable for conductors, insulators and semiconductors. The
average spacing between energy states is inversely proportional to the volume
of the solid
Physics for Electronics Engineering: Unit V: Nano Devices : Tag: : Nano Devices - Significance Between Fermi Energy and Volume of the Material
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Physics for Electronics Engineering
PH3254 - Physics II - 2nd Semester - ECE Department - 2021 Regulation | 2nd Semester ECE Dept 2021 Regulation