Moon, S. J. Jin, H. Kim, Kyung Wan Choi, W. S. Lee, Y. S. Yu, J. Cao, G. Sumi, A. Funakubo, H. Bernhard, Christian Noh, T. W. 2008-11-24 We investigated the electronic structures of the 5<i>d</i> Ruddlesden-Popper series Sr₊₁Ir_<i>n</i>O₃₊₁ (<i>n</i>=1, 2, and ∞) using optical spectroscopy and first-principles calculations. As 5<i>d</i> orbitals are spatially more extended than 3<i>d</i> or 4<i>d</i> orbitals, it has been widely accepted that correlation effects are minimal in 5<i>d</i> compounds. However, we observed a Mott insulator-metal transition with a change of bandwidth as we increased <i>n</i>. In addition, the artificially synthesized perovskite SrIrO₃ showed a very large mass enhancement of about 6, indicating that it was in a correlated metallic state. application/pdf https://folia.unifr.ch/global/documents/300912 https://folia.unifr.ch/documents/300912/files/bernhard_dci.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.101.226402 info:eu-repo/semantics/openAccess License undefined Physical Review Letters. - 2008, vol. 101, no. 22, p. 226402 info:eu-repo/classification/udc/53 Dimensionality-Controlled Insulator-Metal Transition and Correlated Metallic State in 5<i>d</i> Transition Metal Oxides Sr₊₁Ir_<i>n</i>O₃₊₁ (<i>n</i>=1, 2, and ∞) http://purl.org/coar/resource_type/c_6501