Year: 2011
Type: article
Abstract: We report the application of the density-matrix renormalization-group method to a spatially anisotropic two-dimensional Hubbard model at half filling. We find a deconfinement transition induced by the transverse hopping parameter ${t}_{y}$ from an insulator to a metal. Therefore, if ${t}_{y}$ is fixed in the metallic phase, increasing the interaction $U$ leads to a metal-to-insulator transition at a finite critical $U$. This is in contrast to the weak-coupling Hartree-Fock theory which predicts a nesting-induced antiferromagnetic insulator for any $U>0$.
Source: Physical Review B
Authors: S. Moukouri, Eitan Eidelstein
Institution: Hebrew University of Jerusalem
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2067266332