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Correlation, doping and interband effects on the optical conductivity of iron superconductors
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Correlation, doping and interband effects on the optical conductivity of iron superconductors
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Paper
Correlation, doping and interband effects on the optical conductivity of iron superconductors
2014
Overview
Electronic interactions in multiorbital systems lead to non-trivial features in the optical spectrum. In iron superconductors the Drude weight is strongly suppressed with hole-doping. We discuss why the common association of the renormalization of the Drude weight with that of the kinetic energy, used in single band systems, does not hold in multi-orbital systems. This applies even in a Fermi liquid description when each orbital is renormalized differently, as it happens in iron superconductors. We estimate the contribution of interband transitions at low energies. We show that this contribution is strongly enhanced by interactions and dominates the coherent part of the spectral weight in hole-doped samples at frequencies currently used to determine the Drude weight.
Publisher
Cornell University Library, arXiv.org
Subject
