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Title: Superconductivity from repulsion in a single-flavor graphene band
Plain: In a band where all electrons share one spin and one valley (one of graphene's two momentum regions for low-energy electrons), pairs must have odd symmetry, and whether the electrons' own repulsion can produce such pairing at the observed temperature is unsettled.
Precise: For a spin- and valley-polarized rhombohedral graphene band at $n \sim 1e11-1e12\,\mathrm{cm}^{-2}$ with gate-screened Coulomb interaction, compute the odd-parity pairing $T_c$ from Kohn-Luttinger, Berry-curvature-enhanced or order-parameter-fluctuation mechanisms and compare with phonon-mediated odd-parity pairing. An answer is a calculation reproducing $T_c \sim 0.1-0.3\,\mathrm{K}$ and its density and displacement-field window.
Settled by: A quantitative calculation matching measured $T_{c}(n, D)$, tested by the predicted dependence on gate-to-sample distance in devices with different gate spacings.
Kind: phenomenon
Answer type: mechanism
References: (empty)
Literature status: open
Status note: (empty)
Posed since: 2025