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Double-dome superconductivity under pressure in the V-based Kagome metals AV3Sb5 (A = Rb and K)
- Source :
- Physical Review B 105, 094507 (2022), Editors' Suggestion
- Publication Year :
- 2021
-
Abstract
- We present high-pressure electrical transport measurements on the newly discovered V-based superconductors $A$V$_3$Sb$_5$ ($A$ = Rb and K), which have an ideal Kagome lattice of vanadium. Two superconducting domes under pressure are observed in both compounds, as previously observed in their sister compound CsV$_3$Sb$_5$. For RbV$_3$Sb$_5$, the $T_c$ increases from 0.93 K at ambient pressure to the maximum of 4.15 K at 0.38 GPa in the first dome. The second superconducting dome has the highest $T_c$ of 1.57 K at 28.8 GPa. KV$_3$Sb$_5$ displays a similar double-dome phase diagram, however, its two maximum $T_c$s are lower, and the $T_c$ drops faster in the second dome than RbV$_3$Sb$_5$. An integrated temperature-pressure phase diagram of $A$V$_3$Sb$_5$ ($A$ = Cs, Rb and K) is constructed, showing that the ionic radius of the intercalated alkali-metal atoms has a significant effect. Our work demonstrates that double-dome superconductivity under pressure is a common feature of these V-based Kagome metals.<br />Comment: 5 pages, 4 figures
Details
- Database :
- arXiv
- Journal :
- Physical Review B 105, 094507 (2022), Editors' Suggestion
- Publication Type :
- Report
- Accession number :
- edsarx.2104.14487
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.105.094507