Superconductivity in the Z2 kagome metal KV3Sb5
Brenden R. Ortiz, Paul M. Sarte, Eric M. Kenney, Michael J. Graf, Samuel M. L. Teicher, Ram Seshadri, Stephen D. Wilson
DOI 10.1103/PhysRevMaterials.5.034801 · Physical Review Materials
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Abstract
Here we report the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal KV3Sb5. Magnetic susceptibility, resistivity, and heat capacity measurements reveal superconductivity below Tc=0.93K, and density functional theory (DFT) calculations further characterize the normal state as a Z2 topological metal. Our results demonstrate that the recent observation of superconductivity within the related kagome metal CsV3Sb5 is likely a common feature across the AV3Sb5 (A: K, Rb, Cs) family of compounds and establishes them as a rich arena for studying the interplay between bulk superconductivity, topological surface states, and likely electronic density wave order in an exfoliable kagome lattice.
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. | 0.93 | Pressure unresolved | unknown |
| KV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.93 | Pressure unresolved | unknown |
| KV3Sb5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.93 | Pressure unresolved | unknown |
| 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 |
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