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Persistent non-metallic behavior in Sr2IrO4 and Sr3Ir2O7 at high pressures
- Source :
- J. Phys.: Condens. Matter 26, 255603 (2014)
- Publication Year :
- 2013
-
Abstract
- Iridium-based 5d transition-metal oxides are attractive candidates for the study of correlated electronic states due to the interplay of enhanced crystal-field, Coulomb and spin-orbit interaction energies. At ambient pressure, these conditions promote a novel Jeff = 1/2 Mott insulating state, characterized by a gap of the order of ~0.1 eV. We present high-pressure electrical resistivity measurements of single crystals of Sr2IrO4 and Sr3Ir2O7. While no indications of a pressure-induced metallic state up to 55 GPa were found in Sr2IrO4, a strong decrease of the gap energy and of the resistance of Sr3Ir2O7 between ambient pressure and 104 GPa confirm that this compound is in the proximity of a metal-insulator transition.<br />Comment: 5 pages, 4 figures
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- J. Phys.: Condens. Matter 26, 255603 (2014)
- Publication Type :
- Report
- Accession number :
- edsarx.1304.5864
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/0953-8984/26/25/255603