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Jin, Hosub
Quantum Materials Design Lab
Research Interests
  • Spin-orbit coupling, electron-correlation, topological quantum phases

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Dimensionality-Controlled Insulator-Metal Transition and Correlated Metallic State in 5d Transition Metal Oxides Srn+1IrnO3n+1 (n=1, 2, and infinity)

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Title
Dimensionality-Controlled Insulator-Metal Transition and Correlated Metallic State in 5d Transition Metal Oxides Srn+1IrnO3n+1 (n=1, 2, and infinity)
Author
Moon, SJJin, HosubKim, KWChoi, WSLee, YSYu, JaejunCao, GSumi, AFunakubo, HBernhard, CNoh, TW
Keywords
Electronic structure; Metallic compounds; Oxide minerals; Perovskite; Semiconductor insulator boundaries; Transition metal compounds; Transition metals
Issue Date
2008-11
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.101, no., pp.226402 -
Abstract
We investigated the electronic structures of the 5d Ruddlesden-Popper series Srn+1IrnO3n+1 (n=1, 2, and ∞) using optical spectroscopy and first-principles calculations. As 5d orbitals are spatially more extended than 3d or 4d orbitals, it has been widely accepted that correlation effects are minimal in 5d compounds. However, we observed a Mott insulator-metal transition with a change of bandwidth as we increased n. 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.
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DOI
10.1103/PhysRevLett.101.226402
ISSN
0031-9007
Appears in Collections:
PHY_Journal Papers
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