Thermal conductivity of iron under the Earth's inner core pressure

胡翠娥 ¹焦亩鑫 ¹杨学楠 ¹曾召益 ²陈军³

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作者信息

1. College of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 400047,China
2. College of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 400047,China;Laboratory of Computational Physics,Institute of Applied Physics and Computational Mathematics,Beijing 100088,China
3. Laboratory of Computational Physics,Institute of Applied Physics and Computational Mathematics,Beijing 100088,China;Center for Applied Physics and Technology,Peking University,Beijing 100071,China
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Abstract

The thermal conductivity of ε-iron at high pressure and high temperature is a key parameter to constrain the dynamics and thermal evolution of the Earth's core.In this work,we use first-principles calculations to study the Hugoniot sound velocity and the thermal transport properties of ε-iron.The total thermal conductivity considering lattice vibration is 200 W/mK at the Earth's inner core conditions.The suppressed anharmonic interactions can significantly enhance the lattice thermal conductivity under high pressure,and the contribution of the lattice thermal conductivity should not be ignored under the Earth's core conditions.

Key words

thermal conductivity/first-principles/high pressure and high temperature

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基金项目

National Natural Science Foundation of China(12072044)

Natural science Foundation of Chongqing City(cstc2020jcyjmsxmX0616)

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

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