Reversible elastic deformation of functionalized sp2 carbon at pressures of up to 33 GPa

Emmanuel Soignard, Hans D. Hochheimer, Jeffery Yarger, Rishi Raj

Research output: Contribution to journalArticlepeer-review


We show that sp2 carbon bonded to silicon and oxygen can withstand reversible elastic deformation at pressures of up to 33 GPa. These experiments were carried out in a diamond anvil cell. In-situ Raman spectroscopy was employed to record the reversibility of elastic deformation by measuring the movement in the D and G peaks of carbon. Above 33 GPa the material, a silicon oxycarbide, transforms into an unidentified state which is retained upon unloading down to ambient pressure. Thermodynamical analysis suggests that the material could have transformed into a crystalline state at these ultrahigh pressures, driven by mechanical work.

Original languageEnglish (US)
Article number141901
JournalApplied Physics Letters
Issue number14
StatePublished - Oct 6 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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