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Reconciliation of ab initio theory and experimental elastic properties of Al2O3

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5 Author(s)
Gladden, J.R. ; Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802 ; So, Jin H. ; Maynard, J.D. ; Saxe, P.W.
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Ab initio calculations of the basic properties of solids have advanced significantly, and it is now possible to simply access a crystal structure database, and from the given constituent atoms and their positions, calculate reasonably accurate values for elastic constants and thermomechanical properties that may be derived from them. However, progress has been impeded by a unique discrepancy involving the sign of one of the elastic constants of an important material: Al2O3. In this letter, this longstanding discrepancy is resolved with experimental measurements.

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Applied Physics Letters  (Volume:85 ,  Issue: 3 )