The Remeika stannides ($R_3{\mathrm{T}}_4{\mathrm{Sn}}_{13}$, with R = rare earth/alkaline metals, T = transition metal, and X = p-block elements) have been extensively studied due to the interplay between the charge-density-wave (CDW) ordering and superconductivity often found in these materials. Here, we explore the relationship between these two orders in cubic ${\mathrm{La}}_3{\mathrm{Co}}_4{\mathrm{Sn}}_{13}$ by conducting electrical transport measurements under uniaxial stress along different crystallographic directions ([100], [110], and [111]). We find that the superconducting transition temperature $\left(T_{\mathrm{c}}\right)$ is suppressed under compression for all directions measured, in contrast to previous measurements under hydrostatic pressure. This indicates $s$-wave superconductivity. The CDW transition temperature is also suppressed under compression for all measured directions. The simultaneous suppression of superconductivity and CDW order suggests that changes in $T_{\mathrm{c}}$ with uniaxial stress are mainly driven by changes in the electronic density of states and not a competition between these two orders.

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• Charge density waves
• Pairing mechanisms
• Pressure effects
• Superconducting phase transition
• Superconductivity
• Pressure techniques
• Resistivity measurements