Application of Variational Methods on he theory of Superconductivity
No Thumbnail Available
Date
2009-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
There are two main theories in superconductivity: i) Microscopic or (BCS) theory which
describes why materials are superconducting, ii) The phenomenological theory which describes
the properties of superconductors in magnetic fields; Unlike the microscopic (BCS)
theory the phenomenological theory is based on a so-called phenomenological order parameter.
Most physical problems in physics can not be solved exactly, and hence they need to
be dealt with approximately. The principles of variations as developed for providing an
elegant description of a wide variety of physical phenomena; Here we are using this method
to solve problems related to the phenomenological theory of superconductivity, which
includes London’s equation, first and second Ginzburg-Landau equation and in the case
of weak superconductivity, the penetration of the magnetic field on Josephson’s contact
between two superconductors, when there is an insulator between them, i.e Ferrell-Prange
equation and the physical phenomena on the junction
Description
Keywords
Theory of Superconductivity