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Two-dimensional (2D) transition metal dichalcogenides (TMDs) are a versatile class of quantum materials of interest to various fields including, e.g., nanoelectronics, optical devices, and topological and correlated quantum matter. Tailoring the electronic properties of TMDs is essential to their applications in many directions. Here we report that a highly controllable and uniform on-chip 2D metallization process converts a class of atomically thin TMDs into robust superconductors, a property belonging to none of the starting materials. As examples, we demonstrate the introduction of superconductivity into a class of 2D air-sensitive topological TMDs, including monolayers of Td-WTe2, 1T’-MoTe2 and 2H-MoTe2, as well as their natural and twisted bilayers, metalized with an ultrathin layer of Palladium. This class of TMDs are known to exhibit intriguing topological phases ranging from topological insulator, Weyl semimetal to fractional Chern insulator. The unique, high quality two-dimensional metallization process is based on our recent finding of the long-distance non-Fickian in-plane mass transport and chemistry in 2D that occur at surprisingly low temperatures and in devices fully encapsulated with inert insulating layers. Highly compatible with existing nanofabrication techniques for van der Waals (vdW) stacks, our results offer a route to designing and engineering superconductivity and topological phases in a class of correlated 2D materials.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: 2D topological chalcogenides
, on-chip metallization
, superconductivity


Date published: 2024-06-21

Publisher: American Physical Society (APS)

Journal:

• Physical Review X (ISSN: 21603308) vol. 14 issue. 2 021051

Funding:

• Air Force Office of Scientific Research FA9550-23-1-0140
• National Science Foundation DMR-2011750
• Materials Research Science and Engineering Center, Harvard University
• Office of Naval Research N00014-21-1-2804
• Alfred P. Sloan Foundation
• Gordon and Betty Moore Foundation GBMF9064
• David and Lucile Packard Foundation
• Judith Rothschild Foundation
• Japan Society for the Promotion of Science 21H05233
• Japan Society for the Promotion of Science 23H02052
• Ministry of Education, Culture, Sports, Science and Technology
• CAREER DMR-1942942
• Eric and Wendy Schmidt Transformative Technology Fund
• Zuckerman Foundation
• World Premier International Research Center Initiative

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1103/physrevx.14.021051

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Updated at: 2026-02-16 16:30:23 +0900

Published on MDR: 2026-02-16 13:57:32 +0900