Forty years of high-temperature superconductivity

The first demonstration of superconductivity at 35 kelvin occurred in 1986, initiating four decades of intensive materials research and presenting a significant scientific puzzle regarding this unusual state of matter. This breakthrough, achieved by Georg Bednorz and K. Alex Müller, who were awarded the Nobel Prize in Physics in 1987 for their discovery, marked a pivotal moment in condensed matter physics. Their work on cuprate superconductors opened a new frontier, pushing the boundaries of accessible superconducting temperatures far beyond the previous record of 23 kelvin. The discovery spurred a global race to find even higher-temperature superconductors, with subsequent research leading to materials exhibiting superconductivity at temperatures above 100 kelvin, and even approaching room temperature under extreme pressure conditions. Despite significant progress, the fundamental mechanisms behind high-temperature superconductivity, particularly in cuprates, remain a subject of ongoing debate and investigation among physicists. Understanding these mechanisms is crucial for developing practical applications, such as lossless power transmission and advanced magnetic levitation systems, which could revolutionize energy and transportation sectors. The field continues to explore new material compositions and theoretical frameworks to unlock the full potential of superconductivity.