Signature of stripe pinning in optical conductivity

Details Signature of stripe pinning in optical conductivity Signature of stripe pinning in optical conductivity

2003-03-03

arxiv.org/abs/cond-mat/0303036v2

Phys. Rev. B 68, 184513 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

Revised version, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.184513

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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