Self-optimized superconductivity attainable by interlayer phase separation at cuprate interfaces.

ABSTRACT: Stabilizing superconductivity at high temperatures and elucidating its mechanism have long been major challenges of materials research in condensed matter physics. Meanwhile, recent progress in nanostructuring offers unprecedented possibilities for designing novel functionalities. Above all, thin films of cuprate and iron-based high-temperature superconductors exhibit remarkably better superconducting characteristics (for example, higher critical temperatures) than in the bulk, but the underlying mechanism is still not understood. Solving microscopic models suitable for cuprates, we demonstrate that, at an interface between a Mott insulator and an overdoped nonsuperconducting metal, the superconducting amplitude is always pinned at the optimum achieved in the bulk, independently of the car

SUBMITTER: Misawa T 

PROVIDER: S-EPMC4966878 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature