Optical conductivity of unconventional charge density wave systems: Role of vertex corrections
| dc.creator | Aristov, D. N. | |
| dc.creator | Zeyher, R. | |
| dc.date | 2005-04-25 | |
| dc.date.accessioned | 2026-07-07T06:20:19Z | |
| dc.date.available | 2026-07-07T06:20:19Z | |
| dc.description | The optical conductivity of a d-CDW conductor is calculated for electrons on a square lattice and a nearest-neighbor charge-charge interaction using the lowest-order conserving approximation. The spectral properties of the Drude-like peak at low frequencies and the broad hump due to transitions across the gap at large frequencies are discussed, also as a function of temperature and of the second-nearest neighbor hopping term t'. We find that vertex corrections enhance the d.c. conductivity, make the Drude peak narrower and provide a smooth transition from a renormalized regime at low to the bare theory at high frequencies. It is also shown that vertex corrections enhance the temperature dependence of the restricted optical sum leading to a non-negligible violation of the sum rule in the d-CDW state. | |
| dc.description | 10 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0504633 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0504633 | |
| dc.identifier | Phys. Rev. B 72, 115118 (2005) | |
| dc.identifier | doi:10.1103/PhysRevB.72.115118 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/95296 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Optical conductivity of unconventional charge density wave systems: Role of vertex corrections | |
| dc.type | text |