Atomic Reconfiguration of van der Waals Gaps as the Key to Switching in GeTe/Sb₂Te₃ Superlattices.

This may be significant because in experimentally grown SLs, thicknesses of individual blocks vary (from 5 to 13 28 ) with an increment of two atomic layers, which was attributed to a local change in stoichiometry in terms of the number of GeTe BLs.

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