Sally June Tracy

Carnegie Institution for Science

(202) 478-8955


Ph.D. Materials Science, California Institute of Technology 2016

M.S. Materials Science, California Institute of Technology 2011

B.A. Physics, Occidental College 2008


Staff Scientist, Earth & Planets Laboratory, Carnegie Institution for Science 2019 – present

Postdoctoral Associate, Geosciences, Princeton University 2016 – 2018

Post Baccalaureate, Materials Science, Los Alamos National Laboratory 2008 – 2009


D. Kim, R. F. Smith, I. K. Ocampo, F. Coppari, M. C. Marshall, M. K. Ginnane, J. K. Wicks, S. J. Tracy, M. Millot, A Lazicki, J. R. Rygg, J. H. Eggert, T. S. Duffy, Structure and Density of Silicon Carbide to 1.5 TPa and Implications for Extrasolar Planets , Nat. Comm., 13, 2260 (2022).

R. Dutta, S. J. Tracy, R. E. Cohen, F. Miozzi, K. Luo, J. Yang, P. C. Burnley, D. Smith, Y. Meng, S. Chariton, V. B. Prakapenka, and T. S. Duffy, Ultra-high pressure disordered eight-coordinated phase of Mg2GeO4: Analogue for super- Earth mantles, PNAS, 112, e2114424119 (2022).

D. Kim, S. J. Tracy, R. F. Smith, A. E. Gleason, C. A. Bolme, V. B. Prakapenka, K. Appel, S. Speziale, J. K. Wicks, E. J. Berryman, S. K. Han, M. O. Schoelmerich, H. J. Lee, B. Nagler, E. F. Cunningham, M. C. Akin, P. D. Asimow, J. H. Eggert, and T. S. Duffy,, Femtosecond X-ray Diffraction of Laser-shocked Forsterite (Mg2SiO4) to 122 GPa, J. Geophys. Res. 126, e2020JB020337 (2021).

B. Glam, S. J. Tracy, R. F. Smith, J. K. Wicks, D. E. Fratanduono, A. E. Gleason, C. A. Bolme, V. B. Prakapenka, S. Speziale, K. Appel, H. J. Lee, A. MacKinnon, F. Tavella, J. H. Eggert, T. S. Duffy, Structure of boron carbide under laser-based shock-compression at 51 GPa. AIP Conf. Proc. 2272:100010(1-6) (2020).

S. J. Tracy, S. J. Turneaure and T. S. Duffy, Structural response of alpha-quartz under plate-impact shock compression. Sci. Adv. 6, eabb3913 (2020).

M. G. Gorman, D. McGonegle, S. J. Tracy, S. M. Clarke, C. A. Bolme, A. E. Gleason, S. J. Ali, S. Hok, C. W. Greeff, P. G. Heighway, K. Hulpach, B. Glam, D. K. Kim, E. Galtier, H. J. Lee, J. S. Wark, J. H. Eggert, J. K. Wicks, R. F. Smith, Recovery of a high-pressure phase in zirconium formed under laser-driven compression, Phys. Rev. B 102, 024101 (2020).

M. Schölmerich, T. Tschentscher, B. Shrikant, C. Bolme, E. Cunningham, R. Farla, E. Galtier, A. Gleason, M. Harmand, Y. Inubushi, K. Katagiri, K. Miyanishi, B. Nagler, N. Ozaki, T. Preston, R. Redmer, R. Smith, T. Tobase, T. Togashi, S. J. Tracy, Y. Umeda, L. Wollenweber, T. Yabuuchi, U. Zastrau, K. Appel, Evidence of shock-compressed stishovite above 300 GPa, Sci. Rep. 10, 10197 (2020).

R. Briggs, F. Coppari, M. G. Gorman, R. F. Smith, S. J. Tracy, A. L. Coleman, A. Fernandez-Pañella, M. Millot, J. H. Eggert, and D. E. Fratanduono, Measurement of body-centered cubic gold and melting under shock compression, Phys. Rev. Lett 123, 045701 (2019).

S. J. Tracy, R. F. Smith, J. K. Wicks, D. Fratanduono, C. Bolme, A. Gleason, S. Speziale, K. Appel, V. Prakapenka, A. Fernandez Pañella, H. K. Lee, B. Nagler, A. McKinnon, F. Tavella, J. H. Eggert and T. S. Duffy, In situ observation of phase transition in silicon carbide under shock compression using pulsed x-ray diffraction, Phys. Rev. B 99, 214106 (2019).

S. J. Tracy, S. J. Turneaure and T. S. Duffy, In situ x-ray diffraction of shock compressed fused silica, Phys. Rev. Lett. 120, 135702 (2018).

R. Dutta, S. J. Tracy, C. V. Stan, V. B. Prakapenka, R. J. Cava and T. S. Duffy, Phase Stability of Iron Germanate, FeGeO3 to 127 GPa, Phys. Chem. Miner. 0342-1791 (2017).

L. Mauger, J. E. Herriman, O. Hellman, S. J. Tracy, M. S. Lucas, J. A. Muñoz, Yuming Xiao, Ji Li and B. Fultz, Phonons and elasticity of cementite through the Curie temperature, Phys. Rev. B 95, 024308 (2017).

F. C. Yang, J. A. Munoz, O. Hellman, L. Mauger, M. S. Lucas, S. J. Tracy, M. B. Stone, D. L. Abernathy, Yuming Xiao and B. Fultz, Thermally-driven electronic topological transition in FeTi, Phys. Rev. Lett. 117, 076402 (2016).

S. J. Tracy, L. Mauger, H. L. Smith, J. Herriman, H. J. Tan, Y. M. Xiao and B Fultz, Polaron mobility and disordering of the Na sublattice in NaxFePO4, Chem. Mater. 28, 3051 (2016).

S. J. Tracy, L. Mauger, H. J. Tan, J. A. Muñoz, Yuming Xiao, B. Fultz, Polaron-ion correlations in LixFePO4 studied by x-ray nuclear resonant forward scattering at elevated pressure and temperature. Phys. Rev. B 90, 094303 (2014).

L. Mauger, M. S. Lucas, J. A. Muñoz, S. J. Tracy, M. Kresch, Yuming Xiao, Paul Chow, and B. Fultz, Nonharmonic phonons in α-iron at high temperatures. Phys. Rev. B 90, 064303 (2014).

H. L. Smith, B. C. Hornbuckle, L. Mauger, B. Fu, S. J. Tracy, G. B. Thompson, M. S. Lucas, Yuming Xiao, M. Y. Hu, J. Zhao, E. E. Alp, B. Fultz, Changes in vibrational entropy during the early stages of chemical unmixing in fcc Cu–6% Fe. Acta Materialia 61, 7466–7472 (2013).

Chen W. Li, Xiaoli Tang, J. A. Muñoz, J. B. Keith, S. J. Tracy, D. L. Abernathy, and B. Fultz, Structural relationship between negative thermal expansion and quartic anharmonicity of cubic ScF3, Phys. Rev. Lett. 107, 195504 (2011).

G. M. Schmiedeshoff, E. D. Mun, A. W. Lounsbury, S. J. Tracy, E. C. Palm, S. T. Hannahs, J. H. Park, T. P. Murphy, S. L. Bud’ko, and P. C. Canfield, Multiple regions of quantum criticality in YbAgGe, Phys. Rev. B 83, 180408 (2011).

G. M. Schmiedeshoff, A. W. Lounsbury, D. J. Luna, E. W. Okraku, S. J. Tracy, S. L. Bud'ko, and P. C. Canfield, Thermal expansion of the heavy fermion borocarbide YbNi2B2C, J. Phys.: Conf. Ser. 150, 042177 (2009).

G. M. Schmiedeshoff, A. W. Lounsbury, D. J. Luna, S. J. Tracy, A. J. Schramm, S. W. Tozer, V. F. Correa, S. T. Hannahs, T. P. Murphy, E. C. Palm, A. H. Lacerda, S. L. Bud'ko, P. C. Canfield, J. L. Smith, J. C. Lashley, and J. C. Cooley, Versatile and compact capacitive dilatometer, Rev. Sci. Instrum. 77, 123907 (2006).


Los Alamos National Laboratory, Physics & Theoretical Division Colloquium, April 2022

Lawrence Livermore National Laboratory, High Energy Density Science Seminar, February 2022

Caltech, Dept. of Materials Science and Applied Physics, November 2021

Stanford, Dept. of Geological Sciences, May 2021

University of South Florida, Dept. of Physics Colloquium, March 2021

Smithsonian Institution, Dept. of Mineral Sciences, January 2020

Geological Society of Washington, January 2020

Mineralogy Lecture Series, Johns Hopkins University, October 2019

Gordon Research Conference on X-Ray Science, August 2019

Neighborhood Lecture Series, Carnegie Institution for Science, May 2019

Mineralogy Lecture Series, Johns Hopkins University, October 2018

European Crystallographic Meeting, August 2018

Gordon Research at High Pressure Conference, July 2018

Carnegie Institute of Washington, Geophysical Laboratory Seminar, May 2018

University of California, Berkeley, Dept. of Materials Science and Engineering, February 2018

Lawrence Livermore National Laboratory, Shock Physics Group, October 2017

APS Conference on Shock Compression of Condensed Matter, July 2017

Princeton University, Dept. of Geoscience Solid Earth Seminar, April 2017

The Minerals, Metals & Materials Society Annual Meeting, February 2016


AGU Mineral and Rock Physics Section Secretary 2021-2022

APS March Meeting session convener 2021

First Light Science School Teacher Carnegie Academy of Science, 2021 - present

AGU Fall meeting session convener 2019, 2020

Lecturer at Dynamic Compression Summer School 2018

Princeton Prison Teaching Initiative 2017-2019

Recent Reviewer: Physical Review Letters, Geophysical Review Letters, Journal of Physical Chemisty Letters, Nature Communications, Chemistry of Materials, Physical Chemistry, Chemical Physics, Journal of Physical Chemistry C, Review of Scientific Instruments, Icarus


American Geophysical Union

American Physical Society

Mineralogical Society of America