Conventional superconductivity pairs electrons with opposite spins (singlet pairing). Triplet superconductivity — where paired electrons have aligned spins — is rare and typically requires special symmetry conditions or magnetic mediation.
The authors (arXiv:2603.22645) show that a single high-order Van Hove singularity (X9 type) in the electronic density of states can enable triplet superconductivity. The enhanced density of states at the singularity amplifies pairing interactions, and the specific symmetry of the X9 point favors triplet over singlet channels.
The critical temperature Tc scales as a power law of the interaction strength rather than the exponential (BCS) dependence — a direct consequence of the divergent density of states at the singularity.
The through-claim: triplet superconductivity doesn't need magnetic fluctuations or exotic pairing mechanisms. A sufficiently singular density of states provides the amplification, and the singularity's symmetry selects the pairing channel. The Van Hove point is both the engine (density-of-states enhancement) and the filter (symmetry selection). One feature does two jobs.