dc.contributor.author | Hartnoll, Sean | |
dc.contributor.author | Hofman, Diego | |
dc.contributor.author | Metlitski, Max | |
dc.contributor.author | Sachdev, Subir | |
dc.date.accessioned | 2012-01-30T16:05:21Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Hartnoll, Sean, Diego M. Hofman, Max A. Metlitski, and Subir Sachdev. 2011. Quantum critical response at the onset of spin density wave order in two-dimensional metals. Physical Review B 84(12): 125115. | en_US |
dc.identifier.issn | 1550-235X | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:8063398 | |
dc.description.abstract | We study the frequency dependence of the electron self-energy and the optical conductivity in a recently developed field theory of the spin-density-wave quantum phase transition in two-dimensional metals. We focus on the interplay between the Fermi surface “hot spots” and the remainder of the “cold” Fermi surface. Scattering of electrons off the fluctuations of the spin-density-wave order parameter, \(\varphi\), is strongest at the hot spots; we compute the conductivity due to this scattering in a rainbow approximation. We point out the importance of composite operators, built of products of the primary electron or \(\varphi\) fields: These have important effects also away from the hot spots. The simplest composite operator, \(\varphi^2\), leads to deviations from Landau Fermi-liquid behavior on the entire Fermi surface. We also find an intermediate frequency window in which the cold electrons lose their quasiparticle form due to effectively one-dimensional scattering processes. The latter processes are part of umklapp scattering, which leads to singular contributions to the optical conductivity at the lowest frequencies at zero temperature. | en_US |
dc.description.sponsorship | Physics | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | doi://10.1103/PhysRevB.84.125115 | en_US |
dc.relation.hasversion | http://arxiv.org/abs/1106.0001 | en_US |
dash.license | OAP | |
dc.subject | strongly correlated electrons | en_US |
dc.subject | high energy physics | en_US |
dc.title | Quantum Critical Response at the Onset of Spin Density Wave Order in Two-dimensional Metals | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Author's Original | en_US |
dc.relation.journal | Physical Review B | en_US |
dash.depositing.author | Sachdev, Subir | |
dc.date.available | 2012-01-30T16:05:21Z | |
dc.identifier.doi | 10.1103/PhysRevB.84.125115 | * |
dash.contributor.affiliated | Hofman, Diego | |
dash.contributor.affiliated | Sachdev, Subir | |