Faculty, Staff and Student Publications
Language
English
Publication Date
10-10-2023
Journal
Proceedings of the National Academy of Sciences of the United States of America
DOI
10.1073/pnas.2309952120
PMID
37782810
PMCID
PMC10576103
PubMedCentral® Posted Date
10-2-2023
PubMedCentral® Full Text Version
Post-print
Abstract
Earth's inner core is predominantly composed of solid iron (Fe) and displays intriguing properties such as strong shear softening and an ultrahigh Poisson's ratio. Insofar, physical mechanisms to explain these features coherently remain highly debated. Here, we have studied longitudinal and shear wave velocities of hcp-Fe (hexagonal close-packed iron) at relevant pressure-temperature conditions of the inner core using in situ shock experiments and machine learning molecular dynamics (MLMD) simulations. Our results demonstrate that the shear wave velocity of hcp-Fe along the Hugoniot in the premelting condition, defined as
Keywords
Earth’s core, high pressure, machine learning molecular dynamics, premelting, collective motion
Published Open-Access
yes
Recommended Citation
Zhang, Youjun; Wang, Yong; Huang, Yuqian; et al., "Collective Motion in Hcp-Fe at Earth's Inner Core Conditions" (2023). Faculty, Staff and Student Publications. 6139.
https://digitalcommons.library.tmc.edu/uthgsbs_docs/6139
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