Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system
| Autor: | Roderich Moessner, Antoine Georges, Pardeep K. Thakur, Seunghyun Khim, Takashi Oka, Igor Marković, Deepnarayan Biswas, Andrew P. Mackenzie, O. J. Clark, Veronika Sunko, Leonid Pourovskii, Federico Mazzola, Tien-Lin Lee, Sota Kitamura, Philip D. C. King, Matthew D. Watson, Helge Rosner, Timur K. Kim, Pallavi Kushwaha |
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| Přispěvatelé: | European Research Council, The Leverhulme Trust, University of St Andrews. School of Physics and Astronomy, University of St Andrews. Condensed Matter Physics |
| Rok vydání: | 2020 |
| Předmět: |
Free electron model
Materials science Photoemission spectroscopy TK FOS: Physical sciences 02 engineering and technology Electron 7. Clean energy 01 natural sciences Strongly correlated electrons Settore FIS/03 - Fisica della Materia TK Electrical engineering. Electronics Nuclear engineering Metal Condensed Matter::Materials Science Condensed Matter - Strongly Correlated Electrons Condensed Matter::Superconductivity Lattice (order) 0103 physical sciences 010306 general physics QC Research Articles Multidisciplinary Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Physics Mott insulator Settore FIS/01 - Fisica Sperimentale SciAdv r-articles DAS Heterojunction Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology QC Physics visual_art visual_art.visual_art_medium Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Excitation Research Article |
| Zdroj: | Science Advances Sunko, V, Mazzola, F, Kitamura, S, Khim, S, Kushwaha, P, Clark, O J, Watson, M D, Marković, I, Biswas, D, Pourovskii, L, Kim, T K, Lee, T L, Thakur, P K, Rosner, H, Georges, A, Moessner, R, Oka, T, Mackenzie, A P & King, P D C 2020, ' Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system ', Science Advances, vol. 6, no. 6, eaaz0611 . https://doi.org/10.1126/sciadv.aaz0611 |
| ISSN: | 2375-2548 |
| Popis: | An intrinsically nonmagnetic spectroscopy is shown to have strong magnetic sensitivity in Kondo-coupled PdCrO2. A nearly free electron metal and a Mott insulating state can be thought of as opposite ends of the spectrum of possibilities for the motion of electrons in a solid. Understanding their interaction lies at the heart of the correlated electron problem. In the magnetic oxide metal PdCrO2, nearly free and Mott-localized electrons exist in alternating layers, forming natural heterostructures. Using angle-resolved photoemission spectroscopy, quantitatively supported by a strong coupling analysis, we show that the coupling between these layers leads to an “intertwined” excitation that is a convolution of the charge spectrum of the metallic layer and the spin susceptibility of the Mott layer. Our findings establish PdCrO2 as a model system in which to probe Kondo lattice physics and also open new routes to use the a priori nonmagnetic probe of photoemission to gain insights into the spin susceptibility of correlated electron materials. |
| Databáze: | OpenAIRE |
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