Single crystal toroidal diamond anvils for high pressure experiments beyond 5 megabar

• DOI: 10.1038/s41467-018-06071-x
• Publication Date: 2018-08-28T17:03:29Z
• Authors: Zs. Jenei; E. F. O’Bannon; S. T. Weir; H. Cynn; M. J. Lipp; W. J. Evans
• Keywords: Diamond anvil cell; Gasket; Crystal (programming language)

Static compression experiments over 4 Mbar are rare, yet critical for developing accurate fundamental physics and chemistry models, relevant to a range of topics including modeling planetary interiors. Here we show that focused ion beam crafted toroidal single-crystal diamond anvils with ~9.0 μm culets capable producing pressures 5 Mbar. The surface prevents gasket outflow provides means stabilize the central culet. We have reached maximum pressure ~6.15 using Re as in situ marker, regime typically accessed only by double-stage dynamic platforms. Optimizing anvil design is key extending which studies can be performed cell.