2023/07/06 by Y. Y. Wu, Lan Mu, Wu, Y. Y. +22
Materials Science · #2D Materials and Applications #Boron and Carbon Nanomaterials Research #FOS: Physical sciences #Machine Learning in Materials Science #Materials Science (cond-mat.mtrl-sci) #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2307.02989
openalex publication_date 2023/07/06 · openalex created_date 2023/07/08 · openalex updated_date 2026/07/28
The van der Waals (vdW) semiconductor black phosphorus has been widely studied, especially after the discovery of phosphorene. On the contrary, its sister compound violet phosphorus, also a vdW semiconductor, has been rarely studied. Here we report the pressure-induced superconductivity in violet phosphorus up to ∼40 GPa. The superconductivity emerges at 2.75 GPa, which is well below the structural transition from monoclinic (M) to rhombohedral (R) structure at 8.5 GPa. The superconducting transition temperature (T\rmc) shows a plateau of ∼7 K from 3.6 to 15 GPa, across the M to R structural transition, then jumps to another plateau of ∼10 K in the simple cubic (C) structure above 15 GPa. The temperature-pressure superconducting phase diagram of violet phosphorus is established, which is different from that of black phosphorus at low pressure. For black phosphorus, the superconductivity emerges until the structural transition from orthorhombic (O) to R structure at ∼5 GPa, with a lower T\rmc than violet phosphorus. The pressure-induced superconductivity in violet phosphorus demonstrates its tunable electronic properties, and more electronics and optoelectronic applications are expected from this stable vdW semiconductor at ambient conditions.