interfaces

Thirty years after its discovery, superconductivity in cuprates still remains a lively field of research since the microscopic mechanisms leading to high T_c are not yet fully identified and understood. Recent work on the infinite layer CaCuO₂ [1,2] has shown that superconductivity can occur at the interface with SrTiO₃. The conduction at the interface has been related to a chemical doping mechanism with O atoms inserting into the apical position above Cu.
We present results on the study of CaCuO₂/SrTiO₃ bilayer structure. We investigate the influence of different growth parameters on the film quality and electrical properties explored through transport measurements.

[1] Di Castro, D. et al. Occurrence of a high-temperature superconducting phase in (CaCuO₂)_n/(SrTiO₃)_m superlattices. Phys. Rev. B 86, 134524 (2012).
[2] Di Castro, D. et al. High-Tc Superconductivity at the Interface between the CaCuO₂ and SrTiO₃ Insulating Oxides. Phys. Rev. Lett. 115, 147001 (2015).