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    Instabilities of a generalized Gross-Neveu-Yukawa quantum criticality

    Jaewon Kim

    Phys. Rev. B 113, 045155 – Published 29 January, 2026

    DOI: https://doi.org/10.1103/yt5d-41fp

    Abstract

    We study the instabilities to the conformal critical point of an exactly solvable family of Gross-Neveu-Yukawa models. Using conformal field theory techniques, we construct the zero-temperature phase diagram and identify the superconducting and charge neutral ordered phases that destabilize the critical point. Both instabilities appear only when the fermions are strongly renormalized, above a critical anomalous dimension. A higher fermion anomalous dimension also raises the critical degree of time-reversal-symmetry breaking required to suppress superconductivity, indicating that pairing becomes more robust with stronger renormalization.

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