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説明:

The narrow band gaps of semiconductors allow for thick, uniform Josephson junction barriers, potentially enabling reproducible, stable, and compact superconducting qubits. We study vertically stacked van der Waals Josephson junctions with semiconducting weak links, whose crystalline structures and clean interfaces offer a promising platform for quantum devices. We observe robust Josephson coupling across 2–12 nm (3–18 atomic layers) of semiconducting WSe2 and, notably, a crossover from proximity- to tunneling-type behavior with increasing weak-link thickness. Building on these results, we fabricate a prototype all-crystalline merged-element transmon qubit with transmon frequency and anharmonicity closely matching design parameters. We demonstrate dispersive coupling between this transmon and a microwave resonator, highlighting the potential of crystalline superconductor-semiconductor structures for compact, tailored superconducting quantum devices.

権利情報:

• In Copyright
  

  ©2026 American Physical Society

キーワード: Josephson junction, van der Waals heterostructure, Transmon qubit

刊行年月日: 2025-09-05

出版者: American Physical Society (APS)

掲載誌:

• Physical Review Applied (ISSN: 23317019) vol. 24 issue. 3 034016

研究助成金:

• National Science Foundation
• Materials Research Science and Engineering Center DMR-2011738
• Materials Research Science and Engineering Center 2235276
• MEXT, Japan
• Gordon and Betty Moore Foundation’s EPiQS Initiative GBMF10277
• National Research Foundation of Korea
• JSPS KAKENHI 21H05233
• JSPS KAKENHI 23H02052
• Army Research Office W911NF-22-C-0021

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI:

公開URL: https://doi.org/10.1103/3ssz-jjt6

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更新時刻: 2026-07-02 15:49:51 +0900

MDRでの公開時刻: 2026-07-02 18:28:22 +0900