TY - JOUR
T1 - Correlation between Viscoelastic Moduli and Atomic Rearrangements in Metallic Glasses
AU - Yu, Hai Bin
AU - Richert, Ranko
AU - Samwer, Konrad
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/10/6
Y1 - 2016/10/6
N2 - Dynamical moduli, such as storage and loss moduli, characterize the viscoelasticity of materials (i.e., time-dependent elasticity) and convey important information about the relaxation processes of glasses and supercooled liquids. A fundamental question is what ultimately determines them in glassy materials. Here, for several model metallic glasses, we demonstrate that both the storage and loss moduli are uniquely determined by the most probable atomic nonaffine displacements, regardless of temperature or frequency. Moreover, the fast-moving atoms (which contribute to dynamical heterogeneity) do not contribute explicitly to the moduli. Our findings provide a physical basis for the origin of viscoelasticity in metallic glasses.
AB - Dynamical moduli, such as storage and loss moduli, characterize the viscoelasticity of materials (i.e., time-dependent elasticity) and convey important information about the relaxation processes of glasses and supercooled liquids. A fundamental question is what ultimately determines them in glassy materials. Here, for several model metallic glasses, we demonstrate that both the storage and loss moduli are uniquely determined by the most probable atomic nonaffine displacements, regardless of temperature or frequency. Moreover, the fast-moving atoms (which contribute to dynamical heterogeneity) do not contribute explicitly to the moduli. Our findings provide a physical basis for the origin of viscoelasticity in metallic glasses.
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U2 - 10.1021/acs.jpclett.6b01738
DO - 10.1021/acs.jpclett.6b01738
M3 - Article
AN - SCOPUS:84990056317
SN - 1948-7185
VL - 7
SP - 3747
EP - 3751
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 19
ER -