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Electronic structures of layered perovskite Sr2MO4 (M=Ru, Rh, and Ir)
- Authors
- Moon, S. J.; Kim, M. W.; Kim, K. W.; Lee, Y. S.; Kim, J. -Y.; Park, J. -H.; Kim, B. J.; Oh, S. -J.; Nakatsuji, S.; Maeno, Y.; Nagai, I.; Ikeda, S. I.; Cao, G.; Noh, T. W.
- Issue Date
- Sep-2006
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.74, no.11
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 74
- Number
- 11
- ISSN
- 1098-0121
- Abstract
- 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 sigma(omega) exhibit similar interband transitions, indicative of the common electronic structures of the 4d and 5d layered oxides. The energy splittings between the two e(g) orbitals, i.e., d(3z2-r2) and d(x2-y2), are about 2 eV, 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.
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Related Researcher
- Lee, Yun Sang
- College of Natural Sciences (Department of Physics)