Generalized Superconductors and Holographic Optics

Understand

We study generalized holographic s-wave superconductors in four dimensional R-charged black hole and Lifshitz black hole backgrounds, in the probe limit.

• We first establish the superconducting nature of the boundary theories, and then study their optical properties.
• Numerical analysis indicates that a negative Depine-Lakhtakia index may appear at low frequencies in the theory dual to the R-charged black hole, for certain temperature ranges, for specific values of the charge parameter.
• The corresponding cut-off values for these are numerically established in several cases.