Two-Dimensional Material Tunnel Barrier for Josephson Junctions and Superconducting Qubits.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31661615.
- Also identified by DOI 10.1021/acs.nanolett.9b03886.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Quantum computing based on superconducting qubits requires the understanding and control of the materials, device architecture, and operation. However, the materials for the central circuit element, the Josephson junction, have mostly been focused on using the AlO<sub><i>x</i></sub> tunnel barrier. Here, we demonstrate Josephson junctions and superconducting qubits employing two-dimensional materials as the tunnel barrier. We batch-fabricate and design the critical Josephson current of these devices via layer-by-layer stacking <i>N</i> layers of MoS<sub>2</sub> on the large scale. Based on such junctions, MoS<sub>2</sub> transmon qubits are engineered and characterized in a bulk superconducting microwave resonator for the first time. Our work allows Josephson junctions to access the diverse material properties of two-dimensional materials that include a wide range of electrical and magnetic properties, which can be used to study the effects of different material properties in superconducting qubits and to engineer novel quantum circuit elements in the future.