Exact diagonalization study of optical conductivity in two-dimensional Hubbard model
| dc.creator | Tohyama, T. | |
| dc.creator | Inoue, Y. | |
| dc.creator | Tsutsui, K. | |
| dc.creator | Maekawa, S. | |
| dc.date | 2005-05-17 | |
| dc.date | 2005-07-21 | |
| dc.date.accessioned | 2026-07-07T03:05:15Z | |
| dc.date.available | 2026-07-07T03:05:15Z | |
| dc.description | The optical conductivity σ(ω) in the two-dimensional Hubbard model is examined by applying the exact diagonalization technique to small square clusters with periodic boundary conditions up to \sqrt{20} X \sqrt{20} sites. Spectral-weight distributions at half filling and their doping dependence in the 20-site cluster are found to be similar to those in a \sqrt{18} X \sqrt{18} cluster, but different from 4 X 4 results. The results for the 20-site cluster enable us to perform a systematic study of the doping dependence of the spectral-weight transfer from the region of the Mott-gap excitation to lower-energy regions. We discuss the dependence of the Drude weight and the effective carrier number on the electron density at a large on-site Coulomb interaction. | |
| dc.description | 5 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0505404 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0505404 | |
| dc.identifier | Phys. Rev. B 72, 045113 (2005) (5 pages) | |
| dc.identifier | doi:10.1103/PhysRevB.72.045113 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/26377 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Exact diagonalization study of optical conductivity in two-dimensional Hubbard model | |
| dc.type | text |