Scientists investigating the electronic properties of ultra-thin films of new materials — topological insulators (TIs) — have demonstrated a new method to tune their unique properties using strain. Topological insulators are new materials with surfaces that host a new quantum state of matter and are insensitive to contaminants, defects and impurities. Surface electrons in TIs behave like massless Dirac particles in a similar way to electrons in graphene. Moreover, surface currents in topological insulators also preserve their spin orientation and coherence on a macro scale.
from Physics News — ScienceDaily http://ift.tt/PUCILw