A research group led by Associate Professor Takao Sasakawa of Tokyo Institute of Technology and Associate Professor Takeshi Kondo of the University of Tokyo discovered superconducting electrons that cannot be superconducted in superconductors made of copper oxide.A closer look at this mysterious state may elucidate the mechanism of superconductivity that has not been elucidated so far, and may lead to the development of substances that cause superconductivity even at room temperature.
When electricity flows through a substance such as metal, some of the energy is usually lost due to electrical resistance.Reducing this is one of the key challenges in solving today's energy problems.Superconductivity is a phenomenon in which the electrical resistance of a substance becomes zero, and if a transmission network is constructed with superconductors, energy loss can be significantly reduced.However, in order for a substance to become superconducting, it is necessary to cool it to a low temperature of -180 ° C or less.Therefore, many researchers are continuing to search for substances that cause superconductivity at higher temperatures in order to realize superconductivity at room temperature.
In the study of superconductors, the transition temperature at which superconductivity does not occur as the temperature rises becomes important.It has been found that in general superconductors, superconductivity does not occur because the state of electrons changes when the temperature rises to the transition temperature.In this study, copper oxide, which has been confirmed to have the highest transition temperature at present, does not cause superconductivity as the temperature is raised, but the electronic state characteristic of superconductivity is maintained at a temperature about 1.5 times higher. I discovered that I was there.No such substance has been found so far, and it will be an important clue to elucidate the mechanism of superconducting phenomena.Furthermore, it can be expected to be a major step toward the realization of room temperature superconductivity.
If room temperature superconductivity is realized, it will be used not only for home and industrial transmission networks, but also for linear motor cars aiming to open in 2027.I am excited to think about the day when superconductivity, which has the potential to renew our social infrastructure, will be realized.
Source:[Tokyo Institute of Technology] Superconducting electrons that cannot be superconducted-Discovery of superconducting electrons that exist at temperatures much higher than the superconducting temperature-