Complete miscibility amongst the AV3Sb5 kagome superconductors: Design of mixed A-site AV3Sb5 (A: K, Rb, Cs) alloys
Brenden R. Ortiz, Andrea N. Capa Salinas, Miles J. Knudtson, Paul M. Sarte, Ganesh Pokahrel, Stephen D. Wilson
DOI 10.1103/PhysRevMaterials.7.014801 · Physical Review Materials
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Abstract
In this paper, we explore the chemical-property phase diagram of the AV3Sb5 family through A-site alloying. We demonstrate full miscibility of the alkali site, highlighting that the three parent compounds are the terminal ends of a single solid solution. Using both polycrystalline and single crystal methods, we map the dependence of the two primary electronic instabilities: (1) the onset of charge-density wave (CDW) order (TCDW) and (2) the onset of superconductivity (Tc) with alkali-site composition. We show continuous trends in both TCDW and Tc, including a region of enhanced CDW stability in K1−xCsxV3Sb5 alloys. Together, our results open new routes for chemical perturbation and exploration of the chemical-property relationships in the class of AV3Sb5 kagome superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| KV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure not reported | onset |
| RbV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.8 | 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 | onset |
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