The superconductivity and novel transport properties studies of typical elemental superconductors under high pressure

Superconductivity stands as the initial macroscopic quantum phenomenon unearthed by mankind. In the century-old history of the development of superconductivity, several novel transport phenomena have emerged, including the intermediate anomalous metallic state (AMS) in the superconductor-insulator transition at ultralow temperatures and the metal-bosonic insulator-superconductor transition (MIST) near the critical temperature (Tc). These types of behavior, primarily observed in disordered or chemically doped low-dimensional systems, raise intriguing questions about their universality and the underlying physics.

In recent work, we present experimental evidence for a 3D AMS at strong magnetic fields, we observed AMS characteristics, including low-temperature saturation resistance and giant positive magnetoresistance. This discovery offers a fresh platform to explore the long-standing enigmatic physics of AMS. Moreover, we found a magnetic field-induced MIST in highly compressed sulfur, marked by a resistance peak prior to superconductivity. The findings on compressed sulfur, a well-established elemental superconductor, suggest the possibility of unveiling diverse electronic and transport phenomena in putatively simple systems and open avenues for further delving into the essence of anomalous transport mechanisms in condensed matter. Additionally, our study of scandium led to a record-breaking superconducting temperature of 37.6 K at 243 GPa, further contributing to advancements in understanding superconductivity under extreme conditions.