In this illustration, the interaction between the manganese (Mn) atomic ions (purple circles) and disulfur (S2) molecular ions (figure 8s) increases from left to right until the overlap is significant enough to make the system metallic — Image Courtesy: Dean Smith, Argonne National Lab

INSULATOR CUM CONDUCTOR

Under pressure, this soft insulator turns into a conductor & back again

This “squishy” compound of manganese & sulfide can switch states between conductor & insulator at room temperature

Under the conventional rules of science, metals and insulators exhibit opposite…