Eliashbergteoriaan

Eliashbergteoriaan refers to a theoretical framework within superconductivity, primarily associated with the work of Georg Eliasberg. This theory, often referred to as the Eliashberg theory or Eliashberg equations, provides a microscopic description of superconductivity, particularly for superconductors where the electron-phonon interaction is significant. It extends the simpler BCS theory by accounting for retardation effects in the electron-phonon interaction and considering the frequency dependence of the superconducting energy gap. The Eliashberg equations are a set of nonlinear integral equations that describe the superconducting state in terms of the electron-phonon spectral function. Solving these equations allows for the prediction of various superconducting properties, including the critical temperature, critical magnetic field, and the energy gap. The theory has been highly successful in explaining the behavior of conventional superconductors and has also found applications in understanding the properties of some unconventional superconductors. It highlights the crucial role of phonons in mediating the formation of Cooper pairs.