  One of the most important goals of condensed matter physics is materials by
design, i.e. the ability to reliably predict and design materials with a set of
desired properties. A striking example is the deterministic enhancement of the
superconducting properties of materials. Recent experiments have demonstrated
that the metamaterial approach is capable of achieving this goal, such as
tripling the critical temperature Tc in Al-Al2O3 epsilon near zero (ENZ)
core-shell metamaterial superconductors. However, transport properties of such
metamaterials remained much worse compared to conventional superconductors.
Here, we demonstrate that an Al/Al2O3 hyperbolic metamaterial geometry is
capable of a similar Tc enhancement, while having superior transport and
magnetic properties compared to the core-shell metamaterial superconductors.
This result opens up numerous new possibilities for metamaterial enhancement of
Tc in other practically important simple superconductors, such as niobium and
MgB2. It also indicates that the recently discovered hyperbolic properties of
high Tc superconductors may play considerable role in superconductivity
enhancement in cuprates.
