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VOLUME 51 (1990) | ISSUE 6 | PAGE 327
Locally unstable crystal configurations and electronic superconductivity mechanism
A superconductivity mechanism which is based on the nonmonotonic energy dependence of the repulsive Coulomb interaction potential and which leads to an effective attraction is proposed. The necessary condition for the realization of this mechanism is the proximity to the electronic instability point, whose existence is characterized by locally unstable intermediate charge states of ions.