CVD-grown 2D films for superconducting quantum devices – Part II

Materials with low loss at microwave frequencies are essential for improving the coherence of superconducting qubits.  Two-dimensional (2D) superconductors grown by chemical vapor deposition (CVD) provide a scalable materials platform for superconducting quantum circuits. When integrated, CVD-grown films serve as building blocks for key components such as capacitors, Josephson junctions, inductors, and readout resonators for superconducting quantum devices. Combining wafer-scale 2D material growth with established qubit fabrication techniques opens new directions for building high-performance and scalable quantum devices.

In the 2nd part of this two-part talk, we explore the fabrication of fluxonium qubits that integrate an atomically thin superconducting 2D film as an inductor with conventional qubit architectures. Our approach combines two technologies: wafer-scale 2D material growth and superconducting qubit fabrication, aiming to leverage the high kinetic inductance of 2D heterostructures for compact and coherent qubit designs. We discuss the fabrication challenges associated with incorporating large-area 2D films, including material transfer, interface quality, and reproducibility. This approach establishes reliable integration of CVD-grown crystalline 2D films into superconducting qubit circuits.