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DOI | 10.1073/pnas.1704762114 |
Electrical conductivity of SiO2 at extreme conditions and planetary dynamos | |
Scipioni, Roberto1; Stixrude, Lars1; Desjarlais, Michael P.2 | |
2017-08-22 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:34页码:9009-9013 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA |
英文摘要 | Ab intio molecular dynamics simulations show that the electrical conductivity of liquid SiO2 is semimetallic at the conditions of the deep molten mantle of early Earth and super-Earths, raising the possibility of silicate dynamos in these bodies. Whereas the electrical conductivity increases uniformly with increasing temperature, it depends nonmonotonically on compression. At very high pressure, the electrical conductivity decreases on compression, opposite to the behavior of many materials. We show that this behavior is caused by a novel compression mechanism: the development of broken charge ordering, and its influence on the electronic band gap. |
英文关键词 | high pressure Earth' s mantle density functional theory silicate liquids electrical conductivity |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408095300045 |
WOS关键词 | EARTHS MANTLE ; MAGMA OCEAN ; MGSIO3 LIQUID ; PRESSURE ; CRYSTALS ; ALLOYS ; ENERGY |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204770 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.UCL, Dept Earth Sci, London WC1E 6BT, England; 2.Sandia Natl Labs, Pulsed Power Sci Ctr, Albuquerque, NM 87185 USA |
推荐引用方式 GB/T 7714 | Scipioni, Roberto,Stixrude, Lars,Desjarlais, Michael P.. Electrical conductivity of SiO2 at extreme conditions and planetary dynamos[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(34):9009-9013. |
APA | Scipioni, Roberto,Stixrude, Lars,&Desjarlais, Michael P..(2017).Electrical conductivity of SiO2 at extreme conditions and planetary dynamos.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(34),9009-9013. |
MLA | Scipioni, Roberto,et al."Electrical conductivity of SiO2 at extreme conditions and planetary dynamos".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.34(2017):9009-9013. |
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