First-Principles Study of InAs/GaSb Semiconductor Superlattice Structures

초록

We study the energetics of (InAs)(n)/(GaSb)(n) superlattices, where n ranges from 1 to 15, with (001), (110), and (111) interfaces from first-principles. The total energy of the unrelaxed superlattice structure with respect to that of the bulk equilibrium structure is found to be proportional to the number of In-Sb and Ga-As bonds at the interface. Relaxation of the structure leads to decrease in total energy, which is correlated with the interface volume.

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