Issue 1, 2022

Dielectric properties of ice VII under the influence of time-alternating external electric fields

Abstract

The high-pressure solid phase of water known as ice VII has recently attracted a lot of attention when its presence was detected in large exoplanets, their icy satellites, and even in Earth's mantle. Moreover, a transition of ice VII to the superionic phase can be triggered by external electric fields. Here, we investigate the dielectric responses of ice VII to applied oscillating electric fields of various frequencies employing non-equilibrium ab initio molecular dynamics. We focus on the dynamical properties of a dipole-ordered ice VII structure, for which we explored external-field-induced electronic polarisation and the vibrational spectral density of states (VDOS). These analyses are important for the understanding of collective motions in the ice-VII lattice and the electronic properties of this exotic water phase.

Graphical abstract: Dielectric properties of ice VII under the influence of time-alternating external electric fields

Article information

Article type
Paper
Submitted
11 Sep 2021
Accepted
15 Okt 2021
First published
26 Okt 2021

Phys. Chem. Chem. Phys., 2022,24, 56-62

Dielectric properties of ice VII under the influence of time-alternating external electric fields

Z. Futera and N. J. English, Phys. Chem. Chem. Phys., 2022, 24, 56 DOI: 10.1039/D1CP04165G

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