Bringing a hidden superconducting state to light
(PHYSorg.com Physics)

A team of scientists has detected a hidden state of electronic order in a layered material containing lanthanum, barium, copper, and oxygen (LBCO). When cooled to a certain temperature and with certain concentrations of barium, LBCO is known to conduct electricity without resistance, but now there is evidence that a superconducting state actually occurs above this temperature too. It was just a matter of using the right tool-in this case, high-intensity pulses of infrared light-to be able to see it.