Quantum interference in a high-transition-temperature superconductor based on nanoslits on SrTiO3 substrate

Jianxin Lin*, Yicong Huang, Han Zhou, Yao Wu, Haohui Zhang, Shenghao Qin, Xiuyan Peng, Huachuan Wang, Yonathan Anahory

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The Josephson junction, a key component of superconducting quantum circuits, is much less mature, especially for the high-transition (high-Tc) temperature cuprate superconductors. Herein, we report on the realization of high-Tc Josephson junction based on nanoslits on a SrTiO3 substrate. We demonstrate the ability to manipulate the current-voltage characteristics of YBa2Cu3O7−x bridges continuously from superconducting current-dominated to Josephson junction behavior by changing the irradiation parameters of the focused Ga+ ion beam on a single-crystal SrTiO3 substrate. The periodic critical current that depends on the magnetic flux coupled into the superconducting quantum interference devices was observed, which exactly reflects the effects of quantum tunneling and flux quantization. To some extent, this weak link within the framework of the semiconductor manufacturing process shows the potential to provide a cost-effective, highly efficient, and reliable pathway for scaling up quantum mechanical superconducting circuits, which is promising for the fabrication process.

Original languageAmerican English
Article number122601
JournalApplied Physics Letters
Volume124
Issue number12
DOIs
StatePublished - 18 Mar 2024

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