Learn · Introduction to Solid State Physics
Lecture 70 of 87Introductory Semiconductor Physics
Calculating carrier density in semiconductors - I
Prof. Manoj Harbola and Prof. Satyajit Banerjee · IIT Kanpur
Credits and licence
- From
- Introduction to Solid State Physics, IIT Kanpur (at NPTEL)
- Licence
- CC BY-NC-SA, as NPTEL states it. Non-commercial use only.
- Attribution
- NPTEL states: "Distributed under Creative Commons Attribution-ShareAlike / CC BY - NC - SA", beside a BY-NC-SA badge.
- Who can watch
- Tweens profiles and older. How courses are placed
All the lectures
- Introduction to Drude's theory of electrons in a metal- Part 1
- Introduction to Drude's theory of electrons in a metal- Part 2
- Postulates of Drude's theory
- Calculating electrical conductivity of metal using Drude's theory of electrons in metal Part- 1
- Calculating the electrical conductivity of metal using Drude's Model Part-2
- Introduction to Hall effect in Metals Part-1
- Introduction to Hall effect in metals Part-2
- Introduction to Hall effect in metals Part 3
- Understanding thermal conductivity of a metal using Drude's model Part 1
- Understanding thermal conductivity of a metal using Drude's model Part 2
- Introduction to Sommerfeld's Theory of electrons in a metal Part-1
- Introduction to Sommerfeld's Theory of electrons in a metal Part-2
- Introduction to Sommerfeld's Theory of electrons in a metal Part-3
- Fermi energy and Fermi Sphere Part-1
- Fermi energy and Fermi Sphere Part-2
- Density of states Part-1
- Density of states Part-2
- Summary and Discussions of Sommerfeld's Model
- Electronic Contribution to the Specific heat of a Solid Part-1
- Electronic Contribution to the Specific heat of a Solid Part-2
- Electronic Contribution to the Specific heat of a Solid Part-3
- Electronic Contribution to the Specific heat of a Solid Part-4
- Understanding Thermal conductivity of Metals
- Introduction to Magnetism in Metal Part 1
- Introduction to Magnetism in Metal Part 2
- Introduction to Magnetism in Metal Part 3
- Introduction to crystals and bonding in crystals
- Understanding crystal structure using Bravais Lattice
- Bravais Lattice Types Part -1
- Bravais Lattice Types Part-2
- Introduction to different crystal types Part-1
- Introduction to different crystal types Part-2
- Indexing crystal planes
- Scattering of X rays from crystals Part 1
- Scattering of X rays from crystals Part 2
- Reciprocal lattice vectors Part-1
- Reciprocal lattice vectors Part-2
- Reciprocal lattice vectors and Laue's condition for diffraction of waves in crystals Part 1
- Reciprocal lattice vectors and Laue's condition for diffraction of waves in crystals Part 2
- Reciprocal lattice vectors, Laue's condition and Bragg's law for diffraction of waves by a crystal
- Wave equation in a continuous medium and generalization to a discrete medium
- Derivation of wave equation for motion of atoms in a crystal
- Solution of the wave equation for a crystal and the relation between frequency ω and wavevector k
- Group velocity of waves and speed of sound in a crystal
- Waves in a crystal considering interaction among atoms beyond their nearest neighbours
- Normal modes in a crystal : Phonons and their momenta and energy
- Experimental determination of Phonon dispersion curves
- Lattice with two atom basis: Optical Phonons
- Displacement of the atoms for the acoustic and optical Phonons
- Density of states of phonons
- Calculating the density of states of Phonons: The Einstein's and the Debye's Models
- Average energy of Phonons at Temperature T
- Debye's Model of specific heat of crystals
- Anharmonic effects in crystals: thermal expansion and Umkclapp processes
- Going beyond free electron model: Periodic crystal potential and Bloch's theorem for the wavefunction
- Applying perturbation theory to free electron wavefunctions and nearly free electron model
- Applying perturbation theory to free electron wavefunctions and creation of energy gap at zone boundaries
- Mixing of plane waves to get Bloch Wavefunction - I
- Mixing of plane waves to get Bloch Wavefunction - II
- Equivalence of wave vectors k and k+G and reduced zone scheme
- Applying periodic boundary condition to Bloch wavefunction and counting the number of states
- Band theory of metals, insulators and semiconductors
- Kronig- Penney model
- Bloch wavefunction as a linear combination of atomic orbitals: Tight Binding Model- I
- Tight Binding Model- II
- Semiclassical dynamics of a particle in a band and Bloch oscillations
- Experimental observations of Bloch oscillations
- Concept of hole as a current carrier in semiconductors- I
- Concept of hole as a current carrier in semiconductors- II
- Calculating carrier density in semiconductors - I
- Calculating carrier density in semiconductors - II
- Donor and acceptor energy levels in a semiconductor
- charge carrier density in n-type and p-type semiconductors
- Electrical conductivity and hall coefficient in semiconductors
- Paramagnetism in solids I - Magnetic moment and Lande g factor for atoms
- Paramagnetism in solids II - temperature dependence of paramagnetic susceptibility and Curie's Law
- Hund's rule for calculating the total angular momentum J, orbital angular momentum L and spin angular momentum S for an atom
- Examples of performing paramagnetic susceptibility calculations
- Diamagnetism in Solids
- Understanding quenching of orbital angular momentum in transition metal ions
- Ferromagnetism in solids
- Introduction to Meissner state of superconductors and levitation
- Superconducting materials and Type-I and Type-II superconductors
- London's equation for superconductors
- Application of London's equation, behavior of specific heat and density of states in superconductors
- A qualitative introduction to BCS theory of superconductivity
- Josephson's effect in superconductors and tunneling current across barriers