Metal-insulator transition in the hybridized two-orbital Hubbard model revisited
Abstract
In this work we study the two-orbital Hubbard model on a square lattice in the presence of hybridization between nearest-neighbor orbitals and a crystal-field splitting. We use a highly reliable numerical technique based on the density matrix renormalization group to solve the dynamical mean field theory self-consistent impurity problem. We find that the orbital mixing always leads to a finite local density states at the Fermi energy in both orbitals when at least one band is metallic. When one band is doped, and the chemical potential lies between the Hubbard bands in the other band, the coherent quasiparticle peak in this orbital has an exponential behavior with the Hubbard interaction U.
- Publication:
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Journal of Physics Conference Series
- Pub Date:
- June 2018
- DOI:
- 10.1088/1742-6596/1041/1/012002
- arXiv:
- arXiv:1712.05025
- Bibcode:
- 2018JPhCS1041a2002N
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- J. of Phys. Conf. Series, 1041 012002 (2018)