دورية أكاديمية
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Oxygen-Driven Enhancement of the Electron Correlation in Hexagonal Iron at Earth's Inner Core Conditions.

التفاصيل البيبلوغرافية
العنوان: Oxygen-Driven Enhancement of the Electron Correlation in Hexagonal Iron at Earth's Inner Core Conditions.
المؤلفون: Jang BG; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, People's Republic of China.; Korea Institute for Advanced Study, Seoul 02455, Korea., He Y; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, People's Republic of China.; Key Laboratory of High-Temperature and High-Pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550081, People's Republic of China., Shim JH; Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Korea.; Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang 37673, Korea., Mao HK; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, People's Republic of China., Kim DY; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, People's Republic of China.; Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments (MFree), Shanghai Advanced Research in Physical Sciences (SHARPS), Pudong, Shanghai 201203, P.R. China.
المصدر: The journal of physical chemistry letters [J Phys Chem Lett] 2023 Apr 27; Vol. 14 (16), pp. 3884-3890. Date of Electronic Publication: 2023 Apr 18.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: American Chemical Society Country of Publication: United States NLM ID: 101526034 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1948-7185 (Electronic) Linking ISSN: 19487185 NLM ISO Abbreviation: J Phys Chem Lett Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Original Publication: Washington, D.C. : American Chemical Society
مستخلص: Earth's inner core (IC) consists of mainly iron with some light elements. Understanding its structure and related physical properties has been elusive as a result of its required extremely high pressure and temperature conditions. The phase of iron, elastic anisotropy, and density-velocity deficit at the IC have long been questions of great interest. Here, we find that the electron correlation effect is enhanced by oxygen and modifies several important features, including the stability of iron oxides. Oxygen atoms energetically stabilize hexagonal-structured iron at IC conditions and induce elastic anisotropy. Electrical resistivity is much enhanced in comparison to pure hexagonal close-packed (hcp) iron as a result of the enhanced electron correlation effect, supporting the conventional thermal convection model. Moreover, our calculated seismic velocity shows a quantitative match with geologically observed preliminary reference Earth model (PREM) data. We suggest that oxygen is the essential light element to understand and model Earth's IC.
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تواريخ الأحداث: Date Created: 20230418 Date Completed: 20230427 Latest Revision: 20240419
رمز التحديث: 20240419
مُعرف محوري في PubMed: PMC10150722
DOI: 10.1021/acs.jpclett.3c00500
PMID: 37071052
قاعدة البيانات: MEDLINE
الوصف
تدمد:1948-7185
DOI:10.1021/acs.jpclett.3c00500