Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.148301
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Funding
- Division of Materials Science and Engineering, Office of Basic Energy Sciences, Department of Energy through Oak Ridge National Laboratory [DE-AC05-00OR-22725]
- Harold Perlman Family Foundation
- Robert Rees Applied Research Fund
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Despite qualitative differences in their underlying physics, both hard and soft glassy materials exhibit almost identical linear rheological behaviors. We show that these nearly universal properties emerge naturally in a shear-transformation-zone theory of amorphous plasticity, extended to include a broad distribution of internal thermal-activation barriers. The principal features of this barrier-height distribution are predicted by nonequilibrium, effective-temperature thermodynamics. Our theoretical loss modulus G ''(omega) has a peak at the alpha relaxation rate, and a power law decay of the form omega(-zeta) for higher frequencies, in quantitative agreement with experimental data.
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