Charge density wave and superconducting states of La3Co4Sn13 under uniaxial pressure

Abstract

The Remeika stannides (R3T4Sn13, 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 La3Co4Sn13 by conducting electrical transport measurements under uniaxial stress along different crystallographic directions ([100], [110], and [111]). We find that the superconducting transition temperature (Tc) 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 Tc with uniaxial stress are mainly driven by changes in the electronic density of states and not a competition between these two orders.

Source-reported materials — not catalogue approval

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