Signature of stripe pinning in optical conductivity
Strongly Correlated Electrons
2009-11-10 v2 Superconductivity
Abstract
The response of charge stripes to an external electric field applied perpendicular to the stripe direction is studied within a diagrammatic approach for both weak and strong pinning by random impurities. The sound-like mode of the stripes described as elastic strings moves to finite frequency due to impurity pinning. By calculating the optical conductivity we determine this characteristic energy scale for both a single stripe and an array of interacting stripes. The results explain the anomalous far-infrared peak observed recently in optical-conductivity measurements on cuprates.
Cite
@article{arxiv.cond-mat/0303036,
title = {Signature of stripe pinning in optical conductivity},
author = {L. Benfatto and C. Morais Smith},
journal= {arXiv preprint arXiv:cond-mat/0303036},
year = {2009}
}
Comments
Revised version, to appear in Phys. Rev. B