Universality class of the Mott transition in two dimensions
Autor: | S. Moukouri, Eitan Eidelstein |
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Rok vydání: | 2012 |
Předmět: | |
Zdroj: | Physical Review B. 86 |
ISSN: | 1550-235X 1098-0121 |
Popis: | We use the two-step density-matrix renormalization group method to elucidate the long-standing issue of the universality class of the Mott transition in the Hubbard model in two dimensions. We studied a spatially anisotropic two-dimensional Hubbard model with a nonperfectly nested Fermi surface at half-filling. We find that unlike the pure one-dimensional case where there is no metallic phase, the quasi-one-dimensional model displays a genuine metal-insulator transition at a finite value of the interaction. The critical exponent of the correlation length is found to be $\ensuremath{\nu}\ensuremath{\approx}1.0$. This implies that the fermionic Mott transition belongs to the universality class of the 2D Ising model. |
Databáze: | OpenAIRE |
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