Thermodynamics of the metal-insulator transition in the extended Hubbard model
arXiv:1903.09947 · doi:10.21468/SciPostPhys.6.6.067
Abstract
In contrast to the Hubbard model, the extended Hubbard model, which additionally accounts for non-local interactions, lacks systemic studies of thermodynamic properties especially across the metal-insulator transition. Using a variational principle, we perform such a systematic study and describe how non-local interactions screen local correlations differently in the Fermi-liquid and in the insulator. The thermodynamics reveal that non-local interactions are at least in parts responsible for first-order metal-insulator transitions in real materials.
19 pages, 9 figures. Resubmission to SciPost
References in corpus (5)
- Unconventional critical behaviour in a quasi-two-dimensional organic conductor
- Screening and Non-local Correlations in the Extended Hubbard Model from Self-Consistent Combined GW and Dynamical Mean Field Theory
- Momentum-dependent pseudogaps in the half-filled two-dimensional Hubbard model
- Heat capacity of the quantum magnet TiOCl
- Antagonistic effects of nearest-neighbor repulsion on the superconducting pairing dynamics in the doped Mott insulator regime