Anomalous High-Energy Waterfall-Like Electronic Structure in 5 d Transition Metal Oxide Sr2IrO4 with a Strong Spin-Orbit Coupling
書誌事項
- 公開日
- 2015-08-12
- 権利情報
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- https://creativecommons.org/licenses/by/4.0
- https://creativecommons.org/licenses/by/4.0
- DOI
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- 10.1038/srep13036
- 公開者
- Springer Science and Business Media LLC
説明
<jats:title>Abstract</jats:title><jats:p>The low energy electronic structure of Sr<jats:sub>2</jats:sub>IrO<jats:sub>4</jats:sub> has been well studied and understood in terms of an effective J<jats:sub><jats:italic>eff</jats:italic></jats:sub> = 1/2 Mott insulator model. However, little work has been done in studying its high energy electronic behaviors. Here we report a new observation of the anomalous high energy electronic structure in Sr<jats:sub>2</jats:sub>IrO<jats:sub>4</jats:sub>. By taking high-resolution angle-resolved photoemission measurements on Sr<jats:sub>2</jats:sub>IrO<jats:sub>4</jats:sub> over a wide energy range, we have revealed for the first time that the high energy electronic structures show unusual nearly-vertical bands that extend over a large energy range. Such anomalous high energy behaviors resemble the high energy waterfall features observed in the cuprate superconductors. While strong electron correlation plays an important role in producing high energy waterfall features in the cuprate superconductors, the revelation of the high energy anomalies in Sr<jats:sub>2</jats:sub>IrO<jats:sub>4</jats:sub>, which exhibits strong spin-orbit coupling and a moderate electron correlation, points to an unknown and novel route in generating exotic electronic excitations.</jats:p>
収録刊行物
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- Scientific Reports
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Scientific Reports 5 (1), 2015-08-12
Springer Science and Business Media LLC