Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV 6 Sn 6 under High Pressures up to 11 GPa.

R V 6 Sn 6 ( R = Sc, Y, or rare earth) is a new family of kagome metals that have a similar vanadium structural motif as A V 3 Sb 5 ( A = K, Rb, Cs) compounds. Unlike A V 3 Sb 5 , ScV 6 Sn 6 is the only compound among the series of R V 6 Sn 6 that displays a charge density wave (CDW) order at ambient pressure, yet it shows no superconductivity (SC) at low temperatures. Here, we perform a high-pressure transport study on the ScV 6 Sn 6 single crystal to track the evolutions of the CDW transition and to explore possible SC. In contrast to A V 3 Sb 5 compounds, the CDW order of ScV 6 Sn 6 can be suppressed completely by a pressure of about 2.4 GPa, but no SC is detected down to 40 mK at 2.35 GPa and 1.5 K up to 11 GPa. Moreover, we observed that the resistivity anomaly around the CDW transition undergoes an obvious change at ~2.04 GPa before it vanishes completely. The present work highlights a distinct relationship between CDW and SC in ScV 6 Sn 6 in comparison with the well-studied A V 3 Sb 5 .