Symmetry of Photoexcited States and Large-Shift Raman Scattering in Two-Dimensional Mott Insulators
| dc.creator | Tohyama, T. | |
| dc.date | 2005-08-22 | |
| dc.date | 2006-01-13 | |
| dc.date.accessioned | 2026-07-07T06:41:37Z | |
| dc.date.available | 2026-07-07T06:41:37Z | |
| dc.description | Symmetry of photoexcited states with two photoinduced carriers in two-dimensional Mott insulators is examined by applying the numerically exact diagonalization method to finite-size clusters of a half-filled Hubbard model in the strong-coupling limit. The symmetry of minimum-energy bound state is found to be s-wave, which is different from a d_{x^2-y^2} wave of a two-hole pair in doped Mott insulators. We demonstrate that the difference is originated from an exchange of fermions due to the motion of a doubly occupied site. Correspondingly large-shift Raman scattering across the Mott gap exhibits a minimum-energy excitation in the A1 (s-wave) channel. We discuss implications of the results for the Raman scattering and other optical experiments. | |
| dc.description | 7 pages, 9 figures, revised version, Journal of Physical Society of Japan, Vol.75, No.3, in press | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0508519 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0508519 | |
| dc.identifier | J. Phys. Soc. Jpn. 75, 034713 (2006) | |
| dc.identifier | doi:10.1143/JPSJ.75.034713 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/101733 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Symmetry of Photoexcited States and Large-Shift Raman Scattering in Two-Dimensional Mott Insulators | |
| dc.type | text |