Peter Evans recalls the discovery of high-temperature superconductors 20 years ago. Huge technological advances were promised, but have they materialised?
Peter Evans recalls the discovery 20 years ago of materials that conduct electricity without loss at relatively high temperatures. A Nobel prize went to the scientists responsible and huge technological advances were promised, such as high-speed levitating trains and super-efficient power generators. But after the excitement has died down, are these high-temperature superconductors living up to expectations?