Pressure induced metallization of FeO

Experimental and Theoretical Evidence for Pressure-Induced Metallization in FeO with Rocksalt-Type Structure.
Kenji Ohta, R. E. Cohen, Kei Hirose, Kristjan Haule, Katsuya Shimizu, and Yasuo Ohishi 
Phys. Rev. Lett. 108, 026403 (2012)

See also the Physics Synopsis at:
http://physics.aps.org/synopsis-for/10.1103/PhysRevLett.108.026403

Phase diagram of FeO. Stabilities of rB1, insulating B1, and metallic B1 phases are represented by solid, gray solid
and open symbols, respectively. Circles, squares and triangles indicate each set of experiments (runs1–3). A metal-insulator
transition boundary shown as bold line is determined from present data, and linearly extrapolated to the melting condition
(broken bold line). The estimated uncertainty in location of the transition is shown by gray band.