S. G. Ovchinnikov, “Metallization and spin crossover in Magnesiowьstite (Mg$_{1-x}$Fe$_x$O) at high pressures”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2011, Volume 94, Issue 3,Pages 210

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CONDENSED MATTER

Metallization and spin crossover in Magnesiowьstite (Mg$_{1-x}$Fe$_x$O) at high pressures

S. G. Ovchinnikov^ab

^a L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences
^b Siberian Federal University, Krasnoyarsk

Abstract: The pressure-temperature phase diagram of magnesiowьstite has been constructed using the many-electron LDA+GTB approach. The phase diagram includes a quantum critical point at ${P_c} = 55$ GPa and has a symmetrical distribution of high-spin and low-spin states. The existence of a metallic state in a narrow temperature range above the critical point is predicted.

Received: 27.05.2011