Possibility of Realizing Superionic Ice VII in External Electric Fields of Planetary Bodies

Overview

Journal Sci Adv

Specialties Biology
Science

Date 2020 Jun 5

PMID 32494738

Citations 5

Authors

Zdenek Futera

John S Tse

Niall J English

Affiliations

Soon will be listed here.

Abstract

In a superionic (SI) ice phase, oxygen atoms remain crystallographically ordered while protons become fully diffusive as a result of intramolecular dissociation. Ice VII's importance as a potential candidate for a SI ice phase has been conjectured from anomalous proton diffusivity data. Theoretical studies indicate possible SI prevalence in large-planet mantles (e.g., Uranus and Neptune) and exoplanets. Here, we realize sustainable SI behavior in ice VII by means of externally applied electric fields, using state-of-the-art nonequilibrium ab initio molecular dynamics to witness at first hand the protons' fluid dance through a dipole-ordered ice VII lattice. We point out the possibility of SI ice VII on Venus, in its strong permanent electric field.

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