An effective attractive electron-electron interaction and high-Tc superconductivity

✍ Scribed by M.A. Howson; J. Porter; G.J. Morgan

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 274 KB
• Volume: 173
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)90792-w

✦ Synopsis

The repulsive Coulomb interaction is usually seen as opposing the attractive phonon mediated interaction giving rise to superconductivity. Here we show how the vertex part for electron-electron scattering can lead to an effective attractive Coulomb interaction. We then solve the Eliashberg equations with this effective vertex correction and calculate Tc for a model density of states as we vary the strength of the interaction and the effective mass of the electrons.