Phys. Rev. Lett. 98, 045502 (2007) [4 pages]Nondislocation Origin of GaAs Nanoindentation Pop-In EventReceived 15 August 2006; published 23 January 2007 The present Letter demonstrates a pop-in event that is caused by a nanoindentation-induced phase transformation in GaAs, and not accompanied by any dislocation nucleation. Our computer simulations reveal the appearance of the new phase, documented by the structural correlation functions and visualization of the atomic positions. This challenges the orthodox view that the initial pop-in event reflects nucleation of dislocations or their movement, and has a bearing on materials where dislocation activity is not present. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.045502
DOI:
10.1103/PhysRevLett.98.045502
PACS:
62.25.+g, 61.50.Ks, 71.15.Pd, 81.07.Lk
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