Optical conductivity of one-dimensional Mott insulators

Details Optical conductivity of one-dimensional Mott insulators Optical conductivity of one-dimensional Mott insulators

2000-05-22

arxiv.org/abs/cond-mat/0005349v2

Phys. Rev. Lett 86, 680 (2001).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures results added

Scientific paper

10.1103/PhysRevLett.86.680

We calculate the optical conductivity of one-dimensional Mott insulators at low energies using a field theory description. The square root singularity at the optical gap, characteristic of band insulators, is generally absent and appears only at the Luther-Emery point. We also show that only few particle processes contribute significantly to the optical conductivity over a wide range of frequencies and that the bare perturbative regime is recovered only at very large energies. We discuss possible applications of our results to quasi one-dimensional organic conductors.

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