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1. Elasticity and Equations of State


The Elasticity and EOS thrust in CDAC aligns with the paramount need of the NNSA labs for accurate pressure-volume-temperature relations and other elastic properties at extreme conditions for a broad range of materials. Recent CDAC advances in this area have included theoretical studies of the phonon thermodynamics and elastic behavior of GaAs at high temperatures and pressures by former CDAC student Jane Herriman (now at LLNL) and Brent Fultz (Caltech) [1], and studies of amber glass carried out by CDAC Research Scientist Muhtar Ahart and co-workers using Brillouin scattering measurements [2]. EOS studies have also included x-ray measurements of metal alloys carried out in a collaboration between HPCAT and the group of CDAC Academic Partner Susannah Dorfman at Michigan State [3] .

[1] J. E. Herriman and B. Fultz, Phys. Rev. B 101, 214108 (2020);  [2] S. Tkachev et al., Jap. J. Appl. Phys. 60, SDDA04 (2021);  [3] M. Lv et al. J. Geophys. Res. 124, DOI: 10.1029/2020JB020660 (2020)