Soft Hubbard gaps in disordered itinerant models with short-range interaction
| dc.creator | Shinaoka, Hiroshi | |
| dc.creator | Imada, Masatoshi | |
| dc.date | 2008-11-15 | |
| dc.date.accessioned | 2026-07-07T12:35:27Z | |
| dc.date.available | 2026-07-07T12:35:27Z | |
| dc.description | We study the Anderson-Hubbard model in the Hartree-Fock approximation and the exact diagonalization under the coexistence of short-range interaction and diagonal disorder. We show that there exist unconventional soft gaps, where the single-particle (SP) density of states (DOS) $A$ follows a scaling in energy $E$ as $A(E)\propto \exp[-(-γ\log |E-E_F|)^d]$ irrespective of electron filling and long-range order. Here, $d$ is the spatial dimension, $E_F$ the Fermi energy and $γ$ a non-universal constant. We propose a multi-valley energy landscape as their origin. Possible experiments to verify the present theory are proposed. | |
| dc.description | 4 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0811.2492 | |
| dc.identifier | http://arxiv.org/abs/0811.2492 | |
| dc.identifier | Phys. Rev. Lett. 102, 016404 (2009) | |
| dc.identifier | doi:10.1103/PhysRevLett.102.016404 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/217772 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Soft Hubbard gaps in disordered itinerant models with short-range interaction | |
| dc.type | text |