Experimental and theoretical evidence for pressure-induced metallization in FeO with the rock-salt type structure

Details Experimental and theoretical evidence for pressure-induced metallization in FeO with the rock-salt type structure Experimental and theoretical evidence for pressure-induced metallization in FeO with the rock-salt type structure

2011-12-21

arxiv.org/abs/1112.5068v1

Physics

Condensed Matter

Materials Science

Scientific paper

Electrical conductivity of FeO was measured up to 141 GPa and 2480 K in a laserheated diamond-anvil cell. The results show that rock-salt (B1) type structured FeO metallizes at around 70 GPa and 1900 K without any structural phase transition. We computed fully self-consistently the electronic structure and the electrical conductivity of B1 FeO as a function of pressure and temperature, and found that although insulating as expected at ambient condition, B1 FeO metallizes at high temperatures, consistent with experiments. The observed metallization is related to spin crossover.

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