Abstract
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 language | English (US) |
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Article number | 141901 |
Journal | Applied Physics Letters |
Volume | 105 |
Issue number | 14 |
DOIs | |
State | Published - Oct 6 2014 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)