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Publication Citation: Total Dielectric Function: Algebraic Sign, Electron-Lattice Response, and Superconductivity

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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)
Volume: 38
Issue: 4
Pages: pp. 2513 - 2525
Research Areas: Condensed Matter Physics