Replication Data for: Sketched Nanoscale KTaO3-Based Superconducting Quantum Interference Device

The discovery of two-dimensional superconductivity in LAO/KTO (111) and (110) interfaces has raised significant interest in this system. Here we report the fabrication of nanoscale direct current superconducting quantum interference devices (DC-SQUID), created by using a conductive atomic force microscope (c-AFM) to lithographically control the conductivity at the LAO/KTO(110) interface. The field modulation of its critical current, I_c (B), corresponds well with our theoretical modeling, which reveals a large kinetic inductance of the superconducting 2DEG in KTO. The kinetic inductance of the SQUID is tunable by electrical gating from the back, due to the large dielectric constant of KTO. The demonstration of SQUID effect in KTO opens up the possibilities for probing the underlying physics of KTO superconductivity, such as the role of spin-orbit-coupling, pairing symmetry, and inhomogeneity. It also further implies that KTO could serve as a foundation for future quantum devices.