Mott metal-insulator transition in the Hubbard model
| dc.creator | Ohkawa, Fusayoshi J. | |
| dc.date | 2006-06-26 | |
| dc.date | 2007-01-05 | |
| dc.date.accessioned | 2026-07-07T07:38:28Z | |
| dc.date.available | 2026-07-07T07:38:28Z | |
| dc.description | The ground state of the Hubbard model is studied within the single-site approximation (SSA) and beyond the SSA. Within the SSA, the ground state is a typical Mott insulator at the critical point n=1 and U/W=+infty, with n being the electron density per unit cell, W the bandwidth of electrons, and U the on-site repulsion, and is a normal Fermi liquid except for the critical point. Beyond the SSA, the normal Fermi liquid is unstable against a non-normal Fermi liquid state except for a trivial case of U=0 such as a magnetic or superconducting state in two and higher dimensions. In order to explain actual observed metal-insulator transitions, one or several effects among the electron-phonon interaction, multi-band or multi-orbital effects, and effects of disorder should be considered beyond the Hubbard model. | |
| dc.description | 4 pages, 1 figure: a reference added, little shortened | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0606644 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0606644 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/121097 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Mott metal-insulator transition in the Hubbard model | |
| dc.type | text |