Side Gate Tunable Josephson Junctions at the LaAlO₃/SrTiO₃ Interface.

ABSTRACT: Novel physical phenomena arising at the interface of complex oxide heterostructures offer exciting opportunities for the development of future electronic devices. Using the prototypical LaAlO₃/SrTiO₃ interface as a model system, we employ a single-step lithographic process to realize gate-tunable Josephson junctions through a combination of lateral confinement and local side gating. The action of the side gates is found to be comparable to that of a local back gate, constituting a robust and efficient way to control the properties of the interface at the nanoscale. We demonstrate that the side gates enable reliable tuning of both the normal-state resistance and the critical (Josephson) current of the constrictions. The conductance and Josephson current show mesoscopic

SUBMITTER: Monteiro AM 

PROVIDER: S-EPMC5343548 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature