Phys. Rev. Lett. 101, 065506 (2008) [4 pages]Short-Range-Order Lifetime and the “Boson Peak” in a Metallic Glass ModelReceived 13 May 2008; published 8 August 2008 We extend the usual static view of short range order in metallic glasses to a dynamical model of local order. We use an atomistic simulation of a NiZr glass to investigate time-dependent fluctuations of the atomic environment. We show that, even in the “frozen” glass, the solute-centered clusters change their identities between distinct polyhedron types. The frequency spectrum of these transitions exhibits a characteristic peak which we show to be related to a universal vibrational anomaly of disordered solids: the controversial boson peak. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.065506
DOI:
10.1103/PhysRevLett.101.065506
PACS:
61.43.Bn, 61.20.Ja, 61.43.Fs, 63.50.Lm
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.