SOLID STATE PHYSICS

Paper Code: 
PHY 421
Credits: 
4
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

The paper prepares the students to better understand the phenomena related to Characteristics of solids. This will help him/her to take advanced studies in this area. 

12.00
Unit I: 
I

Lattice Dynamics and Optical Properties of Solids: Interatomic forces and lattice dynamics, simple metals, ionic and covalent crystals, optical phonons and dielectric constants, inelastic neutron scattering, Mossbauer effect. Debye-Waller factor, Anharmonicity, thermal expansion and thermal conductivity, Interaction of electrons and phonons with photons, Direct and indirect transitions, Absorption in insulators, Polarities, one-phonon absorption, optical properties of metals, skin effect and anomalous skin effect. 

12.00
Unit II: 
II

Semiconductors: Law of mass action, calculation of impurity conductivity, ellipsoidal energy surfaces in Si and Ge, Hall Effect, recombination mechanism, optical transitions and Schockely-Read theory, excitations, photoconductivity, photo-luminescence. Point’s line, planar and bulk defects, colour centres, F-centre and aggregate centres in alkali halides. 

12.00
Unit III: 
III

Magnetism: Larmor diamagnetism. Paramagnetism, Curie-Langevin and Quantum theories, Susceptibility of rare earth and transition metals, Ferromagnetism: Domain theory, Weiss molecular field and exchange, spin waves: dispersion relation and its experimental determination by inelastic neutrons scattering, heat capacity. Nuclear Magnetic resonance: Conditions of resonance, Bloch equations, NMR- experiment and characteristics of an absorption line. 

12.00
Unit IV: 
IV
Superconductivity : Experimental Results : Meissner effect, heat capacity, microwave and infrared properties, isotope effect, flux quantization, ultrasonic attenuation, density of states, nuclear spin relaxation, Giaver and AC and DC Josephson tunnelings.
 
12.00
Unit V: 
V

 Cooper pairs and derivation of BCS Hamiltonian, results of BCS Theory (no derivation), High Tc superconductivity, introduction to theories of High Tc superconductors.

References: 
1. Kittel - Introduction to Solid State Physics, 5th Edition (John Wiley). 
2. Levy-Solid State Physics. 
3. Patterson - Solid State Physics. 
4. Mckelvy - Solid State and Semi-conductor Physics. 
 
Academic Year: 
2015-2016
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