The Bethe-Salpeter equation at the critical end-point of the Mott transition
Strong repulsive interactions between electrons can lead to a Mott metal-insulator transition. The Dynamical Mean-Field Theory (DMFT) explains the critical end-point and hysteresis region with single-particle concepts such as the spectral function and the quasiparticle weight. In this work, we recon...
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| description | Strong repulsive interactions between electrons can lead to a Mott metal-insulator transition. The Dynamical Mean-Field Theory (DMFT) explains the critical end-point and hysteresis region with single-particle concepts such as the spectral function and the quasiparticle weight. In this work, we reconsider the critical end point of the metal-insulator transition on the two-particle level. We show that the relevant eigenvalue and eigenvector of the non-local Bethe-Salpeter kernel provide a unified picture of the hysteresis region and of the critical end point of the Mott transition. In particular, they simultaneously explain the thermodynamics of the hysteresis region and the iterative stability of the DMFT equations. This analysis paves the way for a deeper understanding of phase transitions in correlated materials. |
| doi_str_mv | 10.48550/arxiv.2002.12745 |
| format | Article |
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| subjects | Bethe-Salpeter equation Critical point Divergence Eigenvalues Eigenvectors Hysteresis Insulators Mean field theory Metal-insulator transition Phase transitions Physics - Strongly Correlated Electrons |
| title | The Bethe-Salpeter equation at the critical end-point of the Mott transition |
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