Pressure-Induced Crossover from Antiferromagnetism to Single-Band Superconductivity via Multiband Superconductivity in Quasi-1D CrZr ₄ Te ₁₄

The intricate interplay between magnetism and superconductivity, ranging from competition to synergy, imparts unconventional pairing and hosts anomalous quantum states. Here, we found pressure-induced transitions: from an antiferromagnetic (AFM) order to a coexisting antiferromagnetic-superconducting state at 4.3 GPa and finally to pure superconductivity at 10.4 GPa. The coexisting phase is marked by an anomalously enhanced AFM order alongside suppressed superconductivity, where a positive curvature in the upper critical field and a nonlinear Hall resistance attest to multiband behavior. With further compression, the crossover from multiband to single-band superconductivity is evidenced by the disappearance of the positive critical field curvature and a transition from a nonlinear to linear Hall resistance. Theoretical calculations reveal the crossover from the AFM to the coexistence phase of AFM and superconductivity benefits from the enhanced p-d hybridization between Cr and Te. These findings not only clarify the intricate interplay between magnetism and superconductivity but also provide a platform for exploring novel quantum phases under pressure.