2006/07/04 by Seung Jae Moon, S. J. Moon, M. W. Kim +22 · 99 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic orbital #Chemistry #Condensed matter physics #Crystallography #Electron #Electronic and Structural Properties of Oxides #Electronic structure #Magnetic and transport properties of perovskites and related materials #Materials science #Perovskite (structure) #Physics #Spectral line #Spectroscopy #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.74.113104
published in Physical Review B 74(11) (American Physical Society)
arxiv created 2006/07/04 · openalex publication_date 2006/09/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigated the electronic structures of the two-dimensional layered perovskite Sr2MO4 (M=4d Ru, 4d Rh, and 5d Ir) using optical spectroscopy and polarization-dependent O 1s x-ray absorption spectroscopy. While the ground states of the series of compounds are rather different, their optical conductivity spectra \ensuremathσ(\ensuremathω) exhibit similar interband transitions, indicative of the common electronic structures of the 4d and 5d layered oxides. The energy splittings between the two eg orbitals, i.e., d_3z2\ensuremath-r2 and d_x2\ensuremath-y2, are about 2\phantom\rule0.3em0exeV, which is much larger than those in the pseudocubic and 3d layered perovskite oxides. The electronic properties of the Sr2MO4 compounds are discussed in terms of the crystal structure and the extended character of the 4d and 5d orbitals.