Observation of two-dimensional superconductivity in bilayers of BaBiO3 and BaPbO3
B. Meir, S. Gorol, T. Kopp, G. Hammerl
DOI 10.1103/PhysRevB.96.100507 · Physical Review B
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Abstract
Lead-doped barium bismuthate is intriguing because of its relatively high critical temperature and the nature of its superconductivity in the vicinity of a charge-density-wave-ordered topological insulator. Here we present bilayers of barium bismuthate and barium leadate showing emergent superconductivity as a function of the barium leadate top layer thickness. Magnetotransport studies allow for the characterization of the superconducting properties in these bilayers to be two-dimensional. In addition current-voltage characteristics of superconducting bilayers reveal signatures of a Berezinskiĭ-Kosterlitz-Thouless transition. The particular observed dependence of the superconducting transition temperature on the thickness of the barium leadate top layer suggests the formation of the superconducting state originating from the interface.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaBi0.25Pb0.75O3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | midpoint |
| BaBi1-xPbxO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13 | Pressure not reported | unknown |
| Ba1-xKxBiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.3 | Pressure not reported | unknown |
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