Optical conductivity near finite-wavelength quantum criticality
| dc.creator | Caprara, S. | |
| dc.creator | Grilli, M. | |
| dc.creator | Di Castro, C. | |
| dc.creator | Enss, T. | |
| dc.date | 2006-10-24 | |
| dc.date | 2007-04-18 | |
| dc.date.accessioned | 2026-07-07T07:56:55Z | |
| dc.date.available | 2026-07-07T07:56:55Z | |
| dc.description | We study the optical conductivity sigma(Omega) of an electron system near a quantum-critical point with finite-wavelength ordering. sigma(Omega) vanishes in clean Galilean-invariant systems, unless electrons are coupled to dynamical collective modes, which dissipate the current. This coupling introduces a nonuniversal energy scale. Depending on the parameters of each specific system, a variety of responses arise near criticality: scaling peaks at a temperature- and doping-dependent frequency, peaks at a fixed frequency, or no peaks to be associated with criticality. Therefore the lack of scaling in the far-infrared conductivity in cuprates does not necessarily call for new concepts of quantum criticality. | |
| dc.description | 4 pages, 4 figures; version as published | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0610676 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0610676 | |
| dc.identifier | Phys. Rev. B 75, 140505(R) (2007) | |
| dc.identifier | doi:10.1103/PhysRevB.75.140505 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/127489 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Optical conductivity near finite-wavelength quantum criticality | |
| dc.type | text |