NEW STATE OF MATTER FOUND: “embodied by “topological insulators,” materials that conduct electricity only on their surfaces. First identified at the ALS in 2007 by a Princeton team led by M. Zahid Hasan, topological insulators have been the subject of intense interest, based on unusual quantum properties that manifest themselves macroscopically.”
http://www-als.lbl.gov/index.php/holding/481-als-reveals-new-state-of-matter.html