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Optical Conductivity with Holographic Lattices

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arxiv 1204.0519 v2 pith:CJYDW7DE submitted 2012-04-02 hep-th cond-mat.str-el

Optical Conductivity with Holographic Lattices

classification hep-th cond-mat.str-el
keywords conductivityopticalfiniteholographiclatticebackgroundbearbehavior
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We add a gravitational background lattice to the simplest holographic model of matter at finite density and calculate the optical conductivity. With the lattice, the zero frequency delta function found in previous calculations (resulting from translation invariance) is broadened and the DC conductivity is finite. The optical conductivity exhibits a Drude peak with a cross-over to power-law behavior at higher frequencies. Surprisingly, these results bear a strong resemblance to the properties of some of the cuprates.

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