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|Author(s):||P Allen; Marvin Cohen; David R. Penn;|
|Title:||Total Dielectric Function: Algebraic Sign, Electron-Lattice Response, and Superconductivity|
|Published:||August 01, 1988|
|Abstract:||The interaction between two test charges in a solid can be described in terms of a total dielectric function that includes electronic and lattice polarization. Crystal stability requires the eigenvalues of ε-1 to be <= 1. Some implications for superconductivity are discussed. A total dielectric function for the electron-lattice system is derived in the mean-field approximation and its inverse is explicitly constructed. The low-lying poles of ε-1 give the correct phonon frequencies as determined by the usual dynamical matrix.|
|Citation:||Physical Review B (Condensed Matter and Materials Physics)|
|Pages:||pp. 2513 - 2525|
|Research Areas:||Condensed Matter Physics|