Evolution of superconductivity and charge order in pressurized RbV${}_3$Sb${}_5$

Abstract

The kagome metals $A$V${}_3$Sb${}_5$ ($A=$ K, Rb, Cs) under ambient pressure exhibit an unusual charge order, from which superconductivity emerges. In this work, by applying hydrostatic pressure using a liquid pressure medium and carrying out electrical resistance measurements for RbV${}_3$Sb${}_5$, we find the charge order becomes suppressed under a modest pressure $p_{\mathrm{c}}$ ($1.4<p_{\mathrm{c}}<1.6$ GPa), while the superconducting transition temperature $T_{\mathrm{c}}$ is maximized. $T_{\mathrm{c}}$ is then gradually weakened with further increase of pressure and reaches a minimum around 14.3 GPa, before exhibiting another maximum around 22.8 GPa, signifying the presence of a second superconducting dome. Distinct normal state resistance anomalies are found to be associated with the second superconducting dome, similar to KV${}_3$Sb${}_5$. Our findings point to qualitatively similar temperature-pressure phase diagrams in KV${}_3$Sb${}_5$ and RbV${}_3$Sb${}_5$, and suggest a close link between the second superconducting dome and the high-pressure resistance anomalies.

intended for a special issue on vanadium-based kagome materials in Chinese Physics B, updated with additional measurements on a second sample

References in corpus (7)

• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
• Unconventional Fermi surface instabilities in the Kagome Hubbard Model
• Unusual competition of superconductivity and charge-density-wave state in a compressed topological kagome metal
• Chiral flux phase in the Kagome superconductor AV${}_3$Sb${}_5$
• Twofold symmetry of $c$-axis resistivity in topological kagome superconductor CsV${}_3$Sb${}_5$ with in-plane rotating magnetic field
• s-wave superconductivity in kagome metal CsV${}_3$Sb${}_5$ revealed by ${}^{121/123}$Sb NQR and ${}^{51}$V NMR measurements
• Nodeless superconductivity in the kagome metal CsV${}_3$Sb${}_5$

Cited by in corpus (15)

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• Dynamical Study of the Origin of the Charge Density Wave in $A$V${}_3$Sb${}_5$ ($A=$K, Rb, Cs) Compounds
• Muon-spin relaxation study of the layered kagome superconductor CsV${}_3$Sb${}_5$
• Electronic properties of correlated kagomé metals AV${}_3$Sb${}_5$(A = K, Rb, Cs): A perspective
• Superconductivity modulated by structural phase transitions in pressurized vanadium-based kagome metals
• Surface-termination-dependent electronic states in kagome superconductors AV3Sb5 (A = K, Rb, Cs) studied by micro-ARPES
• Chiral pair density waves with residual Fermi arcs in RbV3Sb5
• Kagome materials $A$V${}_3$Sb${}_5$ ($A$=K,Rb,Cs): pairing symmetry and pressure-tuning studies
• Structural phase transitions and superconductivity in the Heusler intermetallics $X$Pd${}_2$Sn ($X$ = Ti, Zr, Hf)
• Shubnikov-de Haas oscillations of biaxial-strain-tuned superconductors in pulsed magnetic field up to 60 T
• Titanium doped kagome superconductor CsV3-xTixSb5 and two distinct phases
• Nanoscale strain manipulation of smectic susceptibility in kagome superconductors
• Superconducting critical temperature and dimensionality tuning of RbV${}_3$Sb${}_5$ via biaxial strain