Experimental evidence for nodal superconducting gap in moiré graphene
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Author(s)
Park, Jeong Min
Sun, Shuwen
Watanabe, Kenji
Taniguchi, Takashi
Jarillo-Herrero, Pablo
Date Issued
November 6, 2025
Journal
Science
Publisher
American Association for the Advancement of Science
Citation
Park, Jeong Min, Sun, Shuwen, Watanabe, Kenji, Taniguchi, Takashi and Jarillo-Herrero, Pablo. 2025. "Experimental evidence for nodal superconducting gap in moiré graphene." Science.
Version
Author's final manuscript
Abstract
Understanding the nature of superconductivity in magic-angle graphene remains
challenging. A key difficulty lies in discerning the different energy scales in this strongly
interacting system, particularly the superconducting gap. Here, we report simultaneous tunneling
spectroscopy and transport measurements of magic-angle twisted trilayer graphene. This approach
allows us to identify two coexisting V-shaped tunneling gaps with different energy scales: a
distinct low-energy superconducting gap that vanishes at the superconducting critical temperature
and magnetic field, and a higher-energy pseudogap. The superconducting tunneling spectra display
a linear gap-filling behavior with temperature and magnetic field and exhibit the Volovik effect,
consistent with a nodal order parameter. Our work suggests an unconventional nature of the
superconducting gap and establishes an experimental framework for multidimensional
investigation of tunable quantum materials.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1126/science.adv8376
https://doi.org/10.1126/science.adv8376
