Interface-Driven Two-Dimensional Superconductivity in Bilayers of BaBiO${}_3$ and BaPbO${}_3$

Abstract

Besides the cuprate superconductors lead-doped barium bismuthate still attracts intense interest concerning its relatively high critical temperature and the nature of its superconductivity in vicinity to a charge density wave ordered topological insulator. Here we present bilayers of barium bismuthate and barium leadate and find two-dimensional superconductivity at their interfaces well described by current-voltage characteristics compatible with a Berezinskii-Kosterlitz-Thouless transition. Magneto-transport studies independently prove the two-dimensional character of the superconducting properties in these bilayers. The particular dependence of the superconducting transition temperature on the thickness of the barium leadate top layer suggests the formation of the superconducting state to be strain-induced through the interface.

5 pages, 4 figures, supplemental material

References in corpus (7)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• High-temperature interface superconductivity between metallic and insulating cuprates
• High Tc superconductivity at the interface between the CaCuO2 and SrTiO3 insulating oxides
• Stripe-like nanoscale structural phase separation and optimal inhomogeneity in superconducting BaPb${}_{1-x}$Bi${}_x$O${}_3$
• Topological nature and the multiple Dirac cones hidden in Bismuth high-Tc superconductors
• Size effects in the nonlinear resistance and flux creep in a virtual Berezinskii-Kosterlitz-Thouless state of superconducting films

Cited by in corpus (7)

• Observation of two-dimensional superconductivity at the LaAlO3/KTaO3(110) heterointerface
• Superconductivity-localization interplay and fluctuation magnetoresistance in epitaxial BaPb${}_{1-x}$Bi${}_x$O${}_3$ thin films
• 2D superconductidy driven by interfacial electron-phonon coupling at the BaPbO${}_3$/BaBiO${}_3$ bilayer
• Feeble Metallicity and Robust Semiconducting Regime in Structurally Sensitive Ba(Pb, Sn)O${}_3$ Alloys
• Polarons formation in Bi-deficient BaBiO${}_3$
• Electronic transport in thin films of BaPbO${}_3$: Unraveling two-dimensional quantum effects
• Magnetic transition and spin-polarized two-dimensional electron gas controlled by polarization switching in strained CaMnO${}_3$/BaTiO${}_3$ slabs