Metallic layer in the Earth's lower mantle

被引：16

作者：

Ovchinnikov, S. G. ^{[1
,2
]}

Ovchinnikova, T. M. ^{[3
]}

Dyad'kov, P. G. ^{[4
]}

Plotkin, V. V. ^{[4
]}

Litasov, K. D. ^{[5
]}

机构：

[1] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia

[2] Siberian Fed Univ, Krasnoyarsk 660041, Russia

[3] Russian Acad Sci, Sukhachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia

[4] Russian Acad Sci, Siberian Branch, Trofimuk Inst Petr Gas Geol & Geophys, Novosibirsk 630090, Russia

[5] Russian Acad Sci, Siberian Branch, Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia

来源：

JETP LETTERS | 2012年 / 96卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

ELECTRICAL-CONDUCTIVITY; MECHANISM;

D O I：

10.1134/S002136401214010X

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We predict the insulator-metal-insulator transitions for the temperature and pressure of the lower mantle with the metal layer thickness Delta h a parts per thousand 400 km at the depth of 1400-1800 km. The insulator-metal transition has the Mott-Hubbard origin, while the second transition from metal to insulator results from spin crossover of the Fe2+ ions from high spin S = 2 to low spin S = 0 state. The conductivity in the metal layer may attain 250 S/m. The depth profile of the conductivity is also suggested.

引用

页码：129 / 132

页数：4

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