高压物理学报2024，Vol.38Issue(3)：129-138,10.DOI:10.11858/gywlxb.20240707
地球内核超离子态铁合金及其效应
Superionic Iron Alloys in Earth's Inner Core and Their Effects
摘要
Abstract
Under the conditions of high temperature and high pressure,a series of materials transform into superionic states,which fall between the solid and liquid states and are widely believed to exist in the interior of Earth and exoplanets.Computational research has found that under the temperature and pressure of the Earth's inner core,iron-hydrogen,iron-carbon,and iron-oxygen alloys transform to superionic states,manifested as elements such as hydrogen,carbon,and oxygen flowing rapidly like liquids in solid iron alloys.The flowing light elements cause softening of Fe alloys and a decrease in seismic wave velocities,explaining the characteristics of core density deficient and low shear wave velocity observed in geophysics.The superionic iron-hydrogen alloy in the core can interact with the geomagnetic field,forming a lattice preferred orientation fiber driven by a dipole geomagnetic field,explaining the origin of the anisotropic structure in the inner core.The discovery of superionic iron-light-element alloys in the inner core has updated our understanding of the state of the inner core,and is of great significance for understanding the structure,composition,and evolution of Earth's inner core,as well as the relationship between the inner core structure and the Earth's magnetic field.关键词
超离子态/地球内核/铁合金/各向异性/第一性原理计算Key words
superionic state/Earth's inner core/Fe alloy/anisotropic structure/first-principles calculations分类
数理科学引用本文复制引用
何宇,孙士川,李和平..地球内核超离子态铁合金及其效应[J].高压物理学报,2024,38(3):129-138,10.基金项目
国家自然科学基金(42074104) （42074104）
中国科学院青年交叉团队项目(JCTD-2022-16) （JCTD-2022-16）
