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5d transition metal oxides are generally expected to be metallic because the Coulomb interaction (U) is small compared to their 3d counterpart. However, in contrast to the expectation, many iridium (5d) based oxides show insulating behavior because of strong spin-orbit coupling (SOC). They are often called SOC driven Mott insulators. In these materials, crystal electric field (CEF), U and SOC are of the same order. They often compete each other and give rise to interesting phenomena. Also these materials can be tuned very easily to achieve novel magnetic states. In this talk, I will discuss design, synthesis and study of novel magnetism in a few iridium based oxides with different oxidation states of iridium [1,2,3] .
References:
1. T. Dey et. al., Phys. Rev. B (R) 86, 140405 (2012)
2. T. Dey et. al., Phys. Rev. B 96, 174411 (2017)
3. T. Dey et. al., Phys. Rev. B 93, 014434 (2016) |