Single-crystalline boron-doped diamond superconducting quantum interference devices with regrowth-induced step edge structure.

ABSTRACT: Superconducting quantum interference devices (SQUIDs) are currently used as magnetic flux detectors with ultra-high sensitivity for various applications such as medical diagnostics and magnetic material microstructure analysis. Single-crystalline superconducting boron-doped diamond is an excellent candidate for fabricating high-performance SQUIDs because of its robustness and high transition temperature, critical current density, and critical field. Here, we propose a fabrication process for a single-crystalline boron-doped diamond Josephson junction with regrowth-induced step edge structure and demonstrate the first operation of a single-crystalline boron-doped diamond SQUID above 2 K. We demonstrate that the step angle is a significant parameter for forming the Josephson junction and tha

SUBMITTER: Kageura T 

PROVIDER: S-EPMC6811626 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature