Double-dome superconductivity under pressure in the V-based kagome metals AV3Sb5 (A=Rb and K)
C. C. Zhu, X. F. Yang, W. Xia, Q. W. Yin, L. S. Wang, C. C. Zhao, D. Z. Dai, C. P. Tu, B. Q. Song, Z. C. Tao, Z. J. Tu, C. S. Gong, H. C. Lei, Y. F. Guo, S. Y. Li
DOI 10.1103/PhysRevB.105.094507 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We present high-pressure resistance measurements on the newly discovered V-based superconductors AV3Sb5 (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 CsV3Sb5. For RbV3Sb5, the Tc increases from 0.93 K at ambient pressure to a maximum of 4.15 K at 0.38 GPa in the first dome. The second superconducting dome has the highest Tc of 1.57 K at 28.8 GPa. KV3Sb5 displays a similar double-dome phase diagram, however, its two maximum Tcs are lower, and the Tc drops faster in the second dome than RbV3Sb5. An integrated temperature-pressure phase diagram of AV3Sb5 (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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RbV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.93 | Pressure unresolved | onset |
| KV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.24 | Pressure unresolved | onset |
| RbV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.15 | 0.38 GPa | onset |
| RbV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.57 | 28.8 GPa | onset |
| KV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.9 | 0.32 GPa | onset |
| KV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.14 | 20 GPa | onset |
| CsV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.5 | Pressure not reported | unknown |
Similar papers
Fermi level tuning and double-dome superconductivity in the kagome metal CsV3Sb5−xSnx
similarity 0.98Yuzki M. Oey et al.
Source status unknown — claims are unverified
Superconductivity and topological properties in the kagome metals CsM3Te5 (M=Ti, Zr, Hf): A first-principles investigation
similarity 0.97Jian-Guo Si et al.
Source status unknown — claims are unverified
Structural instability and charge modulations in the kagome superconductor AV3Sb5
similarity 0.97Zijin Ye et al.
Source status unknown — claims are unverified
Unconventional superconductivity via charge fluctuations in the kagome metal CsV3Sb5
similarity 0.97Yuan Tian & Sergey Y. Savrasov
Source status unknown — claims are unverified
Diagnosis of pairing symmetry by vortex and edge spectra in kagome superconductors
similarity 0.97Peize Ding et al.
Source status unknown — claims are unverified
Pressure-Dependent Electronic Superlattice in the Kagome Superconductor CsV3Sb5
similarity 0.97F. Stier et al.
Source status unknown — claims are unverified