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We investigate superconducting pairing tendencies of a two-dimensionalelectron fluid with both valley and spin degrees of freedom, both without andin the presence of an in-plane magnetic field. We present suggestivetheoretical arguments that spontaneous valley polarization can lead to exoticsinglet superconducting tendencies, including pair-density-wave order at zerofield and re-entrant superconductivity at high field. We also find a reducedmagnetic response in the polarized valley, which allows a finite violation ofthe Pauli limit. These results are obtained by a mean-field approach to ageneralized $t$-$J$ model on a triangular lattice and in the dilute limit.Phenomenological similarities to results of recent magic-angle twisted trilayergraphene experiments are noted.

Pair density wave and reentrant superconducting tendencies originating from valley polarization