Computational analysis of the high-pressure structures of InSb

We present results of pseudopotential calculations for the high-pressure ph ases of indium antimonide, showing that the recently observed Cmcm superlat tice structure is the most stable crystal structure at high pressure. Furth ermore, we show that the competing high-pressure phases observed in this an d other III-V semiconductors can be characterized into a hierarchy by order ing and topology and that symmetry is a secondary characteristic in determi ning the energy.