@article{b168d49ce6eb459d8247be9a31909836,
title = "Phase transitions and spin state of iron in FeO under the conditions of Earth's deep interior",
abstract = "Iron-bearing oxides undergo a series of pressure-induced electronic, spin, and structural transitions that can cause seismic anomalies and dynamic instabilities in Earth's mantle and outer core. We employ x-ray diffraction and x-ray emission spectroscopy along with density-functional theory+dynamical mean-field theory calculations to characterize the electronic structure and spin states, and crystal-structural properties of w{\"u}stite (Fe1-xO)-a basic oxide component of Earth's interior-at high pressure-temperature conditions up to 140 GPa and 2100 K. We find that FeO exhibits complex polymorphism under pressure, with abnormal compression behavior associated with electron-spin and crystallographic phase transitions, and resulting in a substantial change of bulk modulus. Our results reveal the existence of a high-pressure phase characterized by a metallic high-spin state of iron at the pressure-temperature conditions near to those of Earth's core-mantle boundary. The presence of high-spin metallic iron near the mantle can significantly influence the geophysical and geochemical properties of Earth's deep interior.",
author = "E. Greenberg and R. Nazarov and A. Landa and J. Ying and Hood, {R. Q.} and B. Hen and R. Jeanloz and Prakapenka, {V. B.} and Struzhkin, {V. V.} and Rozenberg, {G. Kh} and Leonov, {I. V.}",
note = "Publisher Copyright: {\textcopyright} 2023 American Physical Society.",
year = "2023",
month = jun,
day = "15",
doi = "10.1103/PhysRevB.107.L241103",
language = "אנגלית",
volume = "107",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "24",
}