Controversy clarified: Why two insulators together can transport electricity
Tuesday, July 3, 2012 - 13:30
in Physics & Chemistry
In 2004, researchers discovered something amazing: If the two materials, SrTiO3 and LaAlO3, both of which are electrical insulators, are joined together, a thin, electrically conducting region is formed at their interface. Over the subsequent three years, a number of hypotheses were proposed to explain this effect, which has led to controversy ever since.