Probing Iron in Earth's Core With Molecular-Spin Dynamics
Abstract
Dynamic compression of iron to Earth-core conditions is one of the few ways to gather important elastic and transport properties needed to uncover key mechanisms surrounding the geodynamo effect. Herein a new machine-learned ab-initio derived molecular-spin dynamics (MSD) methodology with explicit treatment for longitudinal spin-fluctuations is utilized to probe the dynamic phase-diagram of iron. This framework uniquely enables an accurate resolution of the phase-transition kinetics and Earth-core elastic properties, as highlighted by compressional wave velocity and adiabatic bulk moduli measurements. In addition, a unique coupling of MSD with time-dependent density functional theory enables gauging electronic transport properties, critically important for resolving geodynamo dynamics.
Cite
@article{arxiv.2311.08737,
title = {Probing Iron in Earth's Core With Molecular-Spin Dynamics},
author = {Svetoslav Nikolov and Kushal Ramakrishna and Andrew Rohskopf and Mani Lokamani and Julien Tranchida and John Carpenter and Attila Cangi and Mitchell A. Wood},
journal= {arXiv preprint arXiv:2311.08737},
year = {2023}
}
Comments
3 Figures in main document, 8 Figures in the supplemental information