Large enhancement of $T_{c}$ of Sr$_{2}$RuO$_{4}$ under uni-axial strain

We present AC magnetic susceptibility data taken on samples of the spin-triplet superconductor Sr$_{2}$RuO$_{4}$ under uni-axial strain. To do this, we built a probe that enables us to vary the strain applied to our samples continuously from compression to tension, whilst at cryogenic temperatures. We found that $T_{c}$ changes dramatically with in-plane strain: strain along the crystallographic [100] direction leads to a strong strain-symmetric response of $T_{c}$, which is pushed up from 1.35 K to 1.9 K for 0.23{\%} strain. Conversely, the response along the [110] direction is weak and mostly linear in strain. We discuss these results in the context of the predicted p$_{x} + i$p$_{y}$ topological order parameter.