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.
Cited by 4
Yann in ’t Veld et al., Bandwidth renormalization due to the intersite Coulomb interaction
J. Phys.: Condens. Matter 31, 465603 (2019) [Crossref]
Joseph Paki et al., Charge order and antiferromagnetism in the extended Hubbard model
Phys. Rev. B 99, 245146 (2019) [Crossref]
Xinyang Dong et al., Short-range charge fluctuations in the two-dimensional Hubbard model
Phys. Rev. B 101, 195115 (2020) [Crossref]
Edin Kapetanović et al., Nonlocal exchange interactions in strongly correlated electron systems
Phys. Rev. B 101, 235165 (2020) [Crossref]
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- 1 Universität Bremen / University of Bremen
- 2 Radboud Universiteit Nijmegen / Radboud University Nijmegen [RUN]