| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Thermal conductivity of iron under the Earth's inner core pressure |
| Cui-E Hu(胡翠娥)1, Mu-Xin Jiao(焦亩鑫)1, Xue-Nan Yang(杨学楠)1, Zhao-Yi Zeng(曾召益)1,2,†, and Jun Chen(陈军)2,3,‡ |
1 College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400047, China;
2 Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
3 Center for Applied Physics and Technology, Peking University, Beijing 100071, China |
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Abstract The thermal conductivity of $\varepsilon $-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 $\varepsilon $-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.
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Received: 18 April 2024
Revised: 20 June 2024
Accepted manuscript online: 09 July 2024
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PACS:
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65.40.-b
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(Thermal properties of crystalline solids)
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62.20.-x
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(Mechanical properties of solids)
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62.50.-p
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(High-pressure effects in solids and liquids)
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63.20.dk
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(First-principles theory)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12072044) and the Natural Science Foundation of Chongqing City (Grant No. cstc2020jcyjmsxmX0616). |
Corresponding Authors:
Zhao-Yi Zeng, Jun Chen
E-mail: zhaoyizeng@cqnu.edu.cn;jun_chen@iapcm.ac.cn
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Cite this article:
Cui-E Hu(胡翠娥), Mu-Xin Jiao(焦亩鑫), Xue-Nan Yang(杨学楠), Zhao-Yi Zeng(曾召益), and Jun Chen(陈军) Thermal conductivity of iron under the Earth's inner core pressure 2024 Chin. Phys. B 33 106501
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