Metal to Insulator Transition in the 2-D Hubbard Model: A Slave Boson Approach
| dc.creator | Fresard, Raymond | |
| dc.creator | Doll, Klaus | |
| dc.date | 1996-03-18 | |
| dc.date.accessioned | 2026-07-07T03:08:26Z | |
| dc.date.available | 2026-07-07T03:08:26Z | |
| dc.description | We use the Kotliar-Ruckenstein slave boson technique to treat the strong correlation of the Hubbard model. In a first part we discuss the metal to insulator transition that is occurring on the honeycomb lattice at half filling. We find the critical value for the interaction strength to be U/t=3.1. Above it a gap opens in the spectrum which behaves like (U-U_c) in the vicinity of the transition, and like U for strong coupling. In a second part we calculate the phase diagram of the Hubbard model on the square lattice at finite temperature. The Mermin-Wagner theorem is fulfilled in the largest part of the phase diagram. In the strong coupling regime, the uniform magnetic susceptibility shows a maximum in its doping dependence in agreement with numerical simulations. | |
| dc.description | 8 pages, postscript | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9603125 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9603125 | |
| dc.identifier | published in 'The Hubbard Model: Its Physics and Mathematical Physics' (Editors: D. Baeriswyl, D. K. Campbell, J. M. P. Carmelo, F. Guinea, E. Louis), Plenum Press 1995, p. 385-392 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/27495 | |
| dc.subject | Condensed Matter | |
| dc.title | Metal to Insulator Transition in the 2-D Hubbard Model: A Slave Boson Approach | |
| dc.type | text |