Subject and UNIT: Physics for Information Science: Unit II: Semiconductor Physics
A semiconductor is a solid which has the energy band similar to that of an insulator.
Subject and UNIT: Physics for Information Science: Unit II: Semiconductor Physics
Based on the composition of semiconductors they are classified as:Elemental semiconductors,Compound semiconductors
Subject and UNIT: Physics for Information Science: Unit II: Semiconductor Physics
The resistivity of semiconductors lies between conducting and insulating materials.At 0 K they behave as insulators.
Subject and UNIT: Physics for Information Science: Unit II: Semiconductor Physics
We know materials are classified on the basis of conductivity and resistivity. Semiconductors are the materials which has conductivity, resistivity inbetween conductors and insulators.
Subject and UNIT: Physics for Information Science: Unit I: Electrical Properties of Materials
Based on band theory, and on the basis of the presence of forbidden band gap the materials are classified into three catogories, viz.
Subject and UNIT: Physics for Information Science: Unit I: Electrical Properties of Materials
We know that when two atoms of equal energy levels are brought closer together, the original energy levels viz E1 and E2 splits each into two energy levels
Subject and UNIT: Physics for Information Science: Unit I: Electrical Properties of Materials
Energy band theory of solids plays a very important role in determining whether a solid is a conductor, insulator or a semiconductor. This theory explains how an energy band occurs in a solid.
Electrical Properties of Materials
Subject and UNIT: Physics for Information Science: Unit I: Electrical Properties of Materials
electron moving in constant potential field m* = m.electron moving in a periodic potential m*≠m and therefore the electron in the crystal will behave as a particle with variable effective mass.
Definition, Explanation, Expression, Proof, Equation
Subject and UNIT: Physics for Information Science: Unit I: Electrical Properties of Materials
Effective mass of an electron is the mass of the electron when it is accelerated in a periodic potential and is denoted by m*.
Subject and UNIT: Physics for Information Science: Unit I: Electrical Properties of Materials
Brillouin Zones are constructed first by drawing vectors from the origin to all the lattice points and then by drawing planes which bisects these vectors perpendicularly.
Definition, Explanation, Proof, Equation, Formula
Subject and UNIT: Physics for Information Science: Unit I: Electrical Properties of Materials
Brillouin Zones are the boundaries that are marked by the values of propagation wave vector k in which the electrons can have allowed energy values without diffraction.
Electrical Properties of Materials
Subject and UNIT: Physics for Information Science: Unit I: Electrical Properties of Materials
Before discussing about the tight binding approximation, Let us know about free electron approximation.