An isolated Dirac cone on the surface of ternary tetradymite-like topological insulators
An isolated Dirac cone on the surface of ternary tetradymite-like topological insulators
We have extended the search for topological insulators to the ternary tetradymite-like compounds M2X2Y (M = Bi or Sb; X and Y = S, Se or Te), which are variations of the well-known binary compounds Bi2Se3 and Bi2Te3. Our first-principles computations suggest that five existing compounds are strong topological insulators …