Abstract
Recent observations of superconductivity in twisted bilayer WSe2 (refs. 1,2) have extended the family of moiré superconductors beyond twisted graphene3,4,5,6,7,8,9,10,11,12,13,14,15. In WSe2, two different twist angles were studied, 3.65° (ref. 1) and 5.0° (ref. 2), and two seemingly distinct superconducting phase diagrams were reported, raising the question of whether the superconducting phases in the two devices share a similar origin. Here we address the question by experimentally mapping the evolution of the phase diagram across devices with twist angles spanning the range defined by the initial reports and comparing the results to twist angle-dependent theory. We find that the superconducting state evolves smoothly with twist angle and at all twist angles is proximal to a Fermi surface reconstruction with, presumably, antiferromagnetic ordering, but is neither necessarily tied to the Van Hove singularity nor to the half-band insulator. Our results connect the previously distinct phase diagrams at 3.65° and 5°, and offer new insight into the origin of the superconductivity in this system and its evolution as the correlation strength increases. More broadly, the smooth phase diagram evolution, repeatability between different devices and dynamic gate tunability within each device establish twisted transition metal dichalcogenides as a unique platform for the study of correlated phases as the ratio of interaction strength to bandwidth is varied.
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Data availability
The data relevant to the figures in the main text are available at Zenodo (https://doi.org/10.5281/zenodo.18645190). Additional raw data are available from the corresponding author upon reasonable request.
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Acknowledgements
We thank S. Das Sarma for the discussions. The research on superconductivity in tWSe2 structures was primarily supported as part of Programmable Quantum Materials, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences, under award no. DE-SC0019443. WSe2 was synthesized by J.H., K.B. and L.H. with the support of the Columbia University Materials Science and Engineering Research Center (MRSEC), through NSF grant no. DMR-2011738. K.W. and T.T. acknowledge support from the JSPS KAKENHI (grant nos. 21H05233 and 23H02052), the CREST (JPMJCR24A5), JST and the World Premier International Research Center Initiative (WPI), MEXT, Japan. A.F. and D.M.K. acknowledge funding by the DFG within the Priority Program SPP 2244 “2DMP”—443274199. J.H. and C.R.D. acknowledge further support from the EPiQS Initiative of the Gordon and Betty Moore Foundation, grant no. GBMF10277. We acknowledge support from the Max Planck–New York City Center for Non-Equilibrium Quantum Phenomena. The Flatiron Institute is a division of the Simons Foundation.
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Y.G. and J.C. fabricated the devices. Y.G., J.C., J.P., A.P. and C.R.D. performed the electronic transport measurements and analysed the data. A.F., D.M.-S. and L.K. performed theoretical modelling under the supervision of A.R., D.M.K. and A.J.M.; L.H. grew the WSe2 crystals under the supervision of J.H. and K.B.; K.W. and T.T. grew the hexagonal boron nitride crystals. Y.G., A.J.M. and C.R.D. wrote the manuscript with input from all authors. C.R.D. supervised the project.
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Guo, Y., Cenker, J., Fischer, A. et al. Angle evolution of the superconducting phase diagram in twisted bilayer WSe2. Nature (2026). https://doi.org/10.1038/s41586-026-10357-2
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DOI: https://doi.org/10.1038/s41586-026-10357-2
