Superconductivity in quasi-one-dimensional antiferromagnetic CrNbSe5 microwires under high pressure
Exploring potential superconductivity in magnetic compounds stands as a pivotal and challenging frontier issue. Low-dimensional materials, with their distinctive quantum confinement effects, provide an unparalleled platform for probing such quantum phenomena. Here, we present the discovery of pressure-induced superconductivity in novel antiferromagnetic CrNbSe 5 microwires with a distinctive quasi-one-dimensional structure. Under compression, CrNbSe 5 exhibits superconductivity at 15.0 GPa accompanied by carrier-type switching. The superconducting transition temperature reaches a maximum of 6.0 K at 34.2 GPa. Detailed structural analyses and theoretical calculations corroborate the quantum effects arising from Lifshitz transitions. Additionally, phonon softening and enhanced interchain interactions facilitate pressure-induced superconductivity. These findings offer critical insights into the mechanisms underlying pressure-induced superconductivity and its interplay with structural and electronic instabilities, accelerating the discovery of exotic quantum phenomena in low-dimensional van der Waals magnetic materials.
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