Applications of nanotechnology Nanotechnology is being used in developing countries to help treat disease and prevent health issues. The umbrella term for this kind of nanotechnology is Nano-medicine. Nanotechnology is…
Category: B.Tech./1Sem/Physics
Temperature dependence of critical field
Temperature dependence of critical field The superconducting state cannot exist in the presence of a magnetic field greater than a critical value, even at absolute zero. This critical magnetic field is strongly correlated…
Temperature dependence of resistivity in superconducting materials
Resistivity Resistivity is known as specific electrical resistance or volume resistivity. It can be defined as the intrinsic property of a given material that shows how it opposes the flow of…
Conductivity of Semiconductors
Conductivity of Semiconductors Every atom has an outer band of electrons, known as the valence band. In metals, the electrons from this valence band are not confined to the atom…
Fermi-Dirac distribution
Fermi-Dirac distribution The Fermi-Dirac distribution applies to fermions, particles with half-integer spin which must obey the Pauli exclusion principle. Each type of distribution function has a normalization term multiplying the exponential in the denominator which may…
Formation of bands in Solids
The band theory of solids The band theory of solids is different from the others because the atoms are arranged very close to each other such that the energy levels…
Classification of solids on band theory
Classification of solids on band theory Solids can be classified under following categories based on band theory: Conductors: Metals are conductors in which there is no forbidden energy gap between…
Free electron Theory
Introduction: In solids, electrons in outer most orbits of atoms determine its electrical properties. Electron theory is applicable to all solids, both metals and non metals. In addition, it explains…
Skin Depth
What is Skin Depth? The Skin Depth of a conductor is a product of the Skin Effect. This phenomenon occurs when high frequency electrons are traveling through a conductor, and instead…