2011/04/29 by Darius H. Torchinsky, Jeremy A. Johnson, Keith A. Nelson
Materials Science · Physics and Astronomy · #Composite material #Condensed matter physics #Decoupling (probability) #Exponent #Glass properties and applications #Length scale #Material Dynamics and Properties #Materials science #Mechanics #Physics #Shear (geology) #Solid-state spectroscopy and crystallography #Supercooling #Thermodynamics #cond-mat.dis-nn #cond-mat.soft
paper · pdf · doi:10.1063/1.3700756
arxiv created 2011/04/29 · openalex publication_date 2012/05/03 · arxiv updated 2015/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have performed depolarized impulsive stimulated scattering experiments to observe shear acoustic phonons in supercooled triphenylphosphite (TPP) from ~10-500 MHz. These measurements, in tandem with previously performed longitudinal and shear measurements, permit further analyses of the relaxation dynamics of TPP within the framework of the mode coupling theory. Our results provide evidence of α coupling between the shear and longitudinal degrees of freedom up to a decoupling temperature T(c) = 231 K. A lower bound length scale of shear wave propagation in liquids verified the exponent predicted by theory in the vicinity of the decoupling temperature.