Systems with Imperfect Nesting and Phase Separation
摘要
In the framework of the Rice model for chromium and its alloys, we analyze the instability toward the phase separation in the systems with imperfect nesting both in the absence and in the presence of the applied magnetic field. We consider also the phase separation in organic metals under pressure, in iron-based pnictide superconductors, and the competition between the inhomogeneous phases in the anisotropic Hubbard models.