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The recent discovery of topological insulators with exotic metallic surfacestates has garnered great interest in the fields of condensed matter physicsand materials science. A number of spectacular quantum phenomena have beenpredicted when the surface states are under the influence of magnetism andsuperconductivity, which could open up new opportunities for technologicalapplications in spintronics and quantum computing. To achieve this goal,material realization of topological insulators with desired physical propertiesis of crucial importance. Based on first-principles calculations, here we showthat a large number of ternary chalcopyrite compounds of compositionI-III-VI$_2$ and II-IV-V$_2$ can realize the topological insulating phase intheir native states. The crystal structure of chalcopyrites is derived from thefrequently used zinc-blende structure, and many of them possess a close latticematch to important mainstream semiconductors, which is essential for a smoothintegration into current semiconductor technology. The diverse optical,electrical and structural properties of chalcopyrite semiconductors, andparticularly their ability to host room-temperature ferromagnetism, make themappealing candidates for novel spintronic devices.

Three-Dimensional Topological Insulators in I-III-VI$_2$ and II-IV-V$_2$ Chalcopyrite Semiconductors