Twenty years ago this spring, they discovered that a crystalline compound of lanthanum, barium, copper and oxygen becomes superconducting at a temperature 12 K higher than any material known ...

They are called "barium stars" because of how much barium they contain. The stars were first discovered in 1951 when ...

have discovered a new method to increase the efficiency of solar cells by a factor of 1,000. The team of scientists achieved this breakthrough by creating crystalline layers of barium titanate ...