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

• Published in: Materials Vol. 15; no. 20
• Main Authors: Zhang, Xiaoxiao, Hou, Jun, Xia, Wei, Xu, Zhian, Yang, Pengtao, Wang, Anqi, Liu, Ziyi, Shen, Jie, Zhang, Hua, Dong, Xiaoli, Uwatoko, Yoshiya, Sun, Jianping, Wang, Bosen, Guo, Yanfeng, Cheng, Jinguang
• Format: Journal Article
• Language: English
• Published: MDPI AG 01.10.2022
• Subjects: Superconductors; China
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma15207372

RV[sub.6]Sn[sub.6] (R = Sc, Y, or rare earth) is a new family of kagome metals that have a similar vanadium structural motif as AV[sub.3]Sb[sub.5] (A = K, Rb, Cs) compounds. Unlike AV[sub.3]Sb[sub.5], ScV[sub.6]Sn[sub.6] is the only compound among the series of RV[sub.6]Sn[sub.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[sub.6]Sn[sub.6] single crystal to track the evolutions of the CDW transition and to explore possible SC. In contrast to AV[sub.3]Sb[sub.5] compounds, the CDW order of ScV[sub.6]Sn[sub.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[sub.6]Sn[sub.6] in comparison with the well-studied AV[sub.3]Sb[sub.5].