Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV₆Sn₆ under High Pressures up to...

RV₆Sn₆ (R = Sc, Y, or rare earth) is a new family of kagome metals that have a similar vanadium structural motif as AV₃Sb₅ (A = K, Rb, Cs) compounds. Unlike AV₃Sb₅, ScV₆Sn₆ is the only compound among the series of RV₆Sn₆ 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 ScV₆Sn₆ single crystal to track the evolutions of the CDW transition and to explore possible SC. In contrast to AV₃Sb₅ compounds, the CDW order of ScV₆Sn₆ 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 ScV₆Sn₆ in comparison with the well-studied AV₃Sb₅.