Local pairing versus bulk superconductivity intertwined by the charge density wave order in Cs(V1−xTax)3Sb5
Jinyulin Li, Qing Li, Jinjin Liu, Ying Xiang, Huan Yang, Zhiwei Wang, Yugui Yao, Hai-Hu Wen
DOI 10.1103/PhysRevMaterials.8.014801 · Physical Review Materials
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Abstract
There is a common belief that superconductivity and charge density wave (CDW) order accommodate homogenously in real space but compete with each other for the effective density of states in momentum space in CDW superconductors. By measuring resistivity along the c axis in Cs(V1−xTax)3Sb5, we observe strong superconducting fluctuation behavior coexisting with the CDW order in pristine CsV3Sb5, and the fluctuation region becomes narrowed when the Ta doping suppresses the CDW order. The onset transition temperature barely changes with the Ta doping. Therefore, the bulk superconductivity may be established by a doping-independent local pairing, and it can be suppressed in some regions by the spatially variable CDW order along the c axis. Our results violate the above-mentioned belief about CDW superconductors and demonstrate the intricate interaction between superconductivity and CDW order in this kagome superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CsV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.2 | Pressure not reported | 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 | zero_resistance |
| Cs(V1-xTax)3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.3 | Pressure not reported | onset |
| Cs(V0.88Ta0.12)3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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