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Signature of stripe pinning in optical conductivity

L. Benfatto·C. Morais Smith
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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.

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L. Benfatto, C. Morais Smith. 2003-10-09. Signature of stripe pinning in optical conductivity. https://doi.org/10.1103/physrevb.68.184513

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