Scandolo, S., Chiarotti, G. L. & Tosatti, E. SC4: a metallic phase of carbon at terapascal pressures. Phys. Rev. B 53, 5051–5054 (1996).
Google Scholar
Sun, J., Klug, D. D. & Martoňák, R. Structural transformations in carbon under extreme pressure: beyond diamond. J. Chem. Phys. 130, 194512 (2009).
Google Scholar
Martinez-Canales, M., Pickard, C. J. & Needs, R. J. Thermodynamically stable phases of carbon at multiterapascal pressures. Phys. Rev. Lett. 108, 045704 (2012).
Google Scholar
Madhusudhan, N., Lee, K. K. M. & Mousis, O. A possible carbon-rich interior in super-earth 55 Cancri e. Astrophys. J. 759, L40 (2012).
Google Scholar
Mashian, N. & Loeb, A. CEMP stars: possible hosts to carbon planets in the early universe. Mon. Not. R. Astron. Soc. 460, 2482–2491 (2016).
Google Scholar
Frondel, C. & Marvin, U. B. Lonsdaleite, a hexagonal polymorph of diamond. Nature 214, 587–589 (1967).
Google Scholar
Narayan, J. & Bhaumik, A. Novel phase of carbon, ferromagnetism, and conversion into diamond. J. Appl. Phys. 118, 215303 (2015).
Google Scholar
Johnston, R. L. & Hoffmann, R. Superdense carbon, C8: supercubane or analog of γ-silicon? J. Am. Chem. Soc. 111, 810–819 (1989).
Google Scholar
Mailhiot, C. & McMahan, A. K. Atmospheric-pressure stability of energetic phases of carbon. Phys. Rev. B 44, 11578–11591 (1991).
Google Scholar
Oganov, A. R. & Glass, C. W. Crystal structure prediction using ab initio evolutionary techniques: principles and applications. J. Chem. Phys. 124, 244704 (2006).
Google Scholar
Oganov, A. R., Hemley, R. J., Hazen, R. M. & Jones, A. P. Structure, bonding, and mineralogy of carbon at extreme conditions. Rev. Mineral. Geochem. 75, 47–77 (2013).
Google Scholar
Yin, M. T. & Cohen, M. L. Will diamond transform under megabar pressures? Phys. Rev. Lett. 50, 2006–2009 (1983).
Google Scholar
Biswas, R. & Martin, R. M., Needs, R. J. & Nielsen, O. H. Stability and electronic proper- ties of complex structures of silicon and carbon under pressure: density-functional calculations. Phys. Rev. B 35, 9559–9568 (1987).
Google Scholar
Fahy, S. & Louie, S. G. High-pressure structural and electronic properties of carbon. Phys. Rev. B 36, 3373–3385 (1987).
Google Scholar
Dubrovinsky, L., Dubrovinskaia, N., Prakapenka, V. B. & Abakumov, A. M. Implementation of micro-ball nanodiamond anvils for high-pressure studies above 6 Mbar. Nat. Commun. 3, 1163 (2012).
Google Scholar
Wu, H., Luo, X., Wen, L., Sun, H. & Chen, C. Extreme static compression of carbon to terapascal pressures. Carbon 144, 161–170 (2019).
Google Scholar
Eggert, J. H. et al. Melting temperature of diamond at ultrahigh pressure. Nat. Phys. 6, 40–43 (2010).
Google Scholar
Swift, D. C. Numerical solution of shock and ramp compression for general material properties. J. Appl. Phys. 104, 073536 (2008).
Google Scholar
Smith, R. F. et al. Ramp compression of diamond to five terapascals. Nature 511, 330–333 (2014).
Google Scholar
Knudson, M. D., Desjarlais, M. P. & Dolan, D. H. Shock-wave exploration of the high-pressure phases of carbon. Science 322, 1822–1825 (2008).
Google Scholar
Barrios, M. A. et al. X-ray area backlighter development at the National Ignition Facility. Rev. Sci. Instrum. 85, 11D502 (2014).
Google Scholar
Coppari, F. et al. Optimized x-ray sources for x-ray diffraction measurements at the Omega Laser Facility. Rev. Sci. Instrum. 90, 125113 (2019).
Google Scholar
Wark, J. S., Whitlock, R. R., Hauer, A. A., Swain, J. E. & Solone, P. J. Subnanosecond x-ray diffraction from laser-shocked crystals. Phys. Rev. B 40, 5705–5714 (1989).
Google Scholar
Rygg, J. R. et al. Powder diffraction from solids in the terapascal regime. Rev. Sci. Instrum. 83, 113904 (2012).
Google Scholar
Rygg, J. R. et al. X-ray diffraction at the National Ignition Facility. Rev. Sci. Instrum. 91, 043902 (2020).
Google Scholar
Celliers, P. M. et al. Line-imaging velocimeter for shock diagnostics at the OMEGA laser facility. Rev. Sci. Instrum. 75, 4916–4929 (2004).
Google Scholar
Rothman, S. D. et al. Measurement of the principal isentropes of lead and lead–antimony alloy to ~400 kbar by quasi-isentropic compression. J. Phys. D 38, 733–740 (2005).
Google Scholar
Bradley, D. K. et al. Diamond at 800 GPa. Phys. Rev. Lett. 102, 075503 (2009).
Google Scholar
Coppari, F. et al. Experimental evidence for a phase transition in magnesium oxide at exoplanet pressures. Nat. Geosci. 6, 926–929 (2013).
Google Scholar
Nelmes, R. J., McMahon, M. I., Wright, N. G., Allan, D. R. & Loveday, J. S. Stability and crystal structure of BC8 germanium. Phys. Rev. B 48, 9883–9886 (1993).
Google Scholar
Kurakevych, O. O. et al. Synthesis of bulk BC8 silicon allotrope by direct transformation and reduced-pressure chemical pathways. Inorg. Chem. 55, 8943–8950 (2016).
Google Scholar
Turneaure, S. J., Sharma, S. M., Volz, T. J., Winey, J. M. & Gupta, Y. M. Transformation of shock-compressed graphite to hexagonal diamond in nanoseconds. Sci. Adv. 3, eaao3561 (2017).
Google Scholar
McWilliams, R. S. et al. Strength effects in diamond under shock compression from 0.1 to 1 TPa. Phys. Rev. B 81, 014111 (2010).
Google Scholar
Orlikowski, D., Correa, A. A., Schwegler, E. & Klepeis, J. E. A Steinberg-Guinan model for high-pressure carbon: diamond phase. AIP Conf. Proc. 955, 247–250 (2007).
Google Scholar
Swift, D. C. et al. Equation of state and strength of diamond in high pressure ramp loading. Preprint at https://arxiv.org/abs/2004.03071 (2020).
Lang, J. M., Winey, J. M. & Gupta, Y. M. Strength and deformation of shocked diamond single crystals: orientation dependence. Phys. Rev. B 97, 104106 (2018).
Google Scholar
Taylor, G. I. & Quinney, H. The latent energy remaining in a metal after cold working. Proc. R. Soc. Lond. A 143, 307–326 (1934).
Google Scholar
Suggit, M. J. et al. Nanosecond white-light Laue diffraction measurements of dislocation microstructure in shock-compressed single-crystal copper. Nat. Commun. 3, 1224 (2012).
Google Scholar
Heighway, P. G. et al. Nonisentropic release of a shocked solid. Phys. Rev. Lett. 123, 245501 (2019).
Google Scholar
Ping, Y. et al. Solid iron compressed up to 560 GPa. Phys. Rev. Lett. 111, 065501 (2013).
Google Scholar
Murphy, W. J., Higginbotham, A., Wark, J. S. & Park, N. Molecular dynamics simulations of the Debye-Waller effect in shocked copper. Phys. Rev. B 78, 014109 (2008).
Google Scholar
Ertel, K. et al. DiPOLE: A scalable laser architecture for pumping multi-Hz PW systems. Proc. SPIE 8780, 288–292 (2013).
Pellegrini, C. X-ray free-electron lasers: from dreams to reality. Phys. Scr. T169, 014004 (2016).
Google Scholar
McBride, E. E. et al. Setup for meV-resolution inelastic x-ray scattering measurements and x-ray diffraction at the matter in extreme conditions endstation at the Linac Coherent Light Source. Rev. Sci. Instrum. 89, 10F104 (2018)
Google Scholar
Descamps, A. et al. An approach for the measurement of the bulk temperature of single crystal diamond using an X-ray free electron laser. Sci. Rep. 10, 14564 (2020).
Wang, X., Scandolo, S. & Car, R. Carbon phase diagram from ab initio molecular dynamics. Phys. Rev. Lett. 95, 185701 (2005).
Google Scholar
Correa, A. A., Bonev, S. A. & Galli, G. Carbon under extreme conditions: phase boundaries and electronic properties from first-principles theory. Proc. Natl Acad. Sci. USA 103, 1204–1208 (2006).
Google Scholar
Benedict, L. X. et al. Multiphase equation of state for carbon addressing high pressures and temperatures. Phys. Rev. B 89, 224109 (2014).
Google Scholar
Zimmerman, G., Kershaw, D., Bailey, D. & Harte, J. LASNEX code for inertial confinement fusion. J. Opt. Soc. Am. 68, 549 (1978).
Google Scholar
Boettger, J. C. SESAME Equation Of State For Epoxy. Report LA-12755-MS (Los Alamos National Laboratory, 1994).
Wild, Ch., Herres, N. & Koidl, P. Texture formation in polycrystalline diamond films. J. Appl. Phys. 68, 973–978 (1990).
Google Scholar
Vedam, K. & Schmidt, E. D. D. Variation of refractive index of MgO with pressure to 7 kbar. Phys. Rev. 146, 548–554 (1966).
Google Scholar
Lazicki, A. et al. X-ray diffraction of solid tin to 1.2 TPa. Phys. Rev. Lett. 115, 075502 (2015).
Google Scholar