Abstract
Electrical conductivity of FeO was measured up to 141 GPa and 2480 K in a laser-heated 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.
- Received 25 October 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.026403
© 2012 American Physical Society
Synopsis
Lowered Resistance Under Pressure
Published 12 January 2012
Researchers have observed a new phase transition as the geophysically important mineral becomes metallic when compressed in a diamond anvil cell.
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