Orbital-selective insulator-metal transition inV2O3under external pressure

Orbital-assisted metal-insulator transition in VO2.

We found direct experimental evidence for an orbital switching in the V 3d states across the metal-insulator transition in VO2. We have used soft-x-ray absorption spectroscopy at the V L2,3 edges as a sensitive local probe and have determined quantitatively the orbital polarizations. These results strongly suggest that, in going from the metallic to the insulating state, the orbital occupation ...

Pressure-induced insulator-metal transition in a bilayer manganite: Pressure control of orbital stability

Pressure effects on transport as well as structural properties have been investigated for a bilayer manganite, La222xSr112xMn2O7 (x50.48), near the phase boundary between the ferromagnetic metallic and the A-type antiferromagnetic states. An insulator-metal ~IM! transition is found to be induced by applying pressure of ;0.7 GPa. On the basis of the synchrotron radiation x-ray structural analysi...

Pressure-induced insulator-metal transition in EuMnO3.

We study the influence of external pressure on the electronic and magnetic structure of EuMnO3 from first-principles calculations. We find a pressure-induced insulator-metal transition at which the magnetic order changes from A-type antiferromagnetic to ferromagnetic with a strong interplay with Jahn-Teller distortions. In addition, we find that the non-centrosymmetric E *-type antiferromagneti...

Pressure-induced metal-insulator transition in MgV2O4

On the basis of experimental thermoelectric power results and ab initio calculations, we propose that a metal-insulator transition takes place at high pressure (approximately 6 GPa) in MgV2O4.

Explorer Metal - Insulator Transition and Orbital Order in PbRuO 3