Epsilon near zero (ENZ) conditions have been observed to enhance superconducting properties of a composite metamaterial based on random mixing of superconductor and ferroelectic nanoparticles. Here we analyze several other promising experimental geometries, which may considerably enhance electron pairing interaction in a metamaterial superconductor. The proposed geometries may be fabricated at the current level of nanotechnology development. They enable tuning of both frequency and spatial dispersion of the effective dielectric response function ${\varepsilon }_{\mathrm{eff}}(q,\omega )$ of the metamaterial, thus enabling optimization of the metamaterial superconductor properties.

• Received 24 November 2014
• Revised 18 February 2015

DOI:https://doi.org/10.1103/PhysRevB.91.094501