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Bonding and electronic properties of ice at high pressure

โœ Scribed by B. Militzer

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
846 KB
Volume
112
Category
Article
ISSN
0020-7608

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โœฆ Synopsis

Abstract

The properties of water ice at megabar pressure are characterized with ab initio computer simulations. The focus lies on the metallic Cmcm phase and its insulating distorted analogue with Pnma symmetry. Both phases were recently predicted to occur at 15.5 and 12.5 Mbar, respectively (Militzer and Wilson, Phys Rev Lett, 2010, 105, 195701). The Fermi surface of the Cmcm phase is analyzed and possibility of Fermi nesting to occur is discussed. The Wannier orbital are computed for the Pnma structure and compared to ice X. While ice X shows typical sp^3^ hybridization, in the Pnma structure, the orbitals are deforms and no longer all aligned with the hydrogen bonds.

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