Transition Temperature of Strong-Coupled Superconductors
W. L. McMillan
Abstract
The superconducting transition temperature is calculated as a function of the electron-phonon and electron-electron coupling constants within the framework of the strong-coupling theory. Using this theoretical result, we find empirical values of the coupling constants and the "band-structure" density of states for a number of metals and alloys. It is noted that the electron-phonon coupling constant depends primarily on the phonon frequencies rather than on the electronic properties of the metal. Finally, using these results, one can predict a maximum superconducting transition temperature.
Topics & Concepts
SuperconductivityCondensed matter physicsCoupling constantElectronCoupling (piping)Transition temperaturePhononSuperconducting transition temperatureMaterials scienceTransition metalConstant (computer programming)PhysicsQuantum mechanicsChemistryBiochemistryProgramming languageComputer scienceMetallurgyCatalysisPhysics of Superconductivity and MagnetismSuperconductivity in MgB2 and AlloysMagnetic and transport properties of perovskites and related materials