Direct writing of high temperature superconducting Josephson junctions using a thermal scanning probe

• URL: http://arxiv.org/abs/2410.00372v1
• Date: Tue, 1 Oct 2024 03:48:13 GMT
• Title: Direct writing of high temperature superconducting Josephson junctions using a thermal scanning probe
• Authors: Ngoc My Hanh Duong, Amanuel M. Berhane, Dave Mitchell, Rifat Ullah, Ting Zhang, He Zhu, Jia Du, Simon K. H. Lam, Emma E. Mitchell, Avi Bendavid,
• Abstract summary: We demonstrate for the first time the creation of Josephson-like superconducting nanojunctions using a thermal scanning probe to directly inscribe weak links into microstrips of YBa2Cu3O7-x (YBCO) The resulting nanobridges exhibit clear evidence of Josephson effects, of SNS-type junctions, as shown by both the DC and AC Josephson effects.
• Score: 6.091549518024832
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In this letter, we demonstrate for the first time the creation of Josephson-like superconducting nanojunctions using a thermal scanning probe to directly inscribe weak links into microstrips of YBa2Cu3O7-x (YBCO). Our method effectively reduces the critical current (Ic) over an order of magnitude. The resulting nanobridges exhibit clear evidence of Josephson effects, of SNS-type junctions, as shown by both the DC and AC Josephson effects. This approach provides a novel and flexible method for scaling up quantum mechanical circuits that operate at liquid nitrogen temperatures. Additionally, it offers a promising pathway for modifying properties of the junctions in-situ and post fabrication.

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