Complete miscibility amongst the A V3Sb5 kagome superconductors: Design of mixed A -site A V3Sb5 (A: K, Rb, Cs) alloys

Brenden R. Ortiz, Andrea N. Capa Salinas, Miles J. Knudtson, Paul M. Sarte, Ganesh Pokahrel, Stephen D. Wilson

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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.

Original languageEnglish
Article number014801
JournalPhysical Review Materials
Volume7
Issue number1
DOIs
StatePublished - Jan 2023
Externally publishedYes

Funding

This work was supported by the National Science Foundation (NSF) through Enabling Quantum Leap: Convergent Accelerated Discovery Foundries for Quantum Materials Science, Engineering and Information (Q-AMASE-i): Quantum Foundry at UC Santa Barbara (Grant No. DMR-1906325). The research made use of the shared experimental facilities of the NSF Materials Research Science and Engineering Center at UC Santa Barbara (Grant No. DMR- 1720256). The UC Santa Barbara MRSEC is a member of the Materials Research Facilities Network .

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