https://www.selleckchem.com/pr....oducts/bay-k-8644.ht
We study periodic arrays of impurities that create localized regions of expansion, embedded in two-dimensional crystalline membranes. These arrays provide a simple elastic model of shape memory. As the size of each dilational impurity increases (or the relative cost of bending to stretching decreases), it becomes energetically favorable for each of the M impurities to buckle up or down into the third dimension, thus allowing for of order 2^M metastable surface configurations corresponding to different impurity "spin" configurations.
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