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  Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system

Sunko, V., Mazzola, F., Kitamura, S., Khim, S., Kushwaha, P., Clark, O. J., et al. (2020). Probing spin correlations using angle-resolved photoemission in a coupled metallic/Mott insulator system. Science Advances, 6: eaaz0611, pp. 1-7. doi:10.1126/sciadv.aaz0611.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-BB54-A Version Permalink: http://hdl.handle.net/21.11116/0000-0005-C6C3-F
Genre: Journal Article

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 Creators:
Sunko, V.1, Author              
Mazzola, F.2, Author
Kitamura, S.2, Author
Khim, S.1, Author              
Kushwaha, P.1, Author              
Clark, O. J.2, Author
Watson, M. D.2, Author
Marković, I.1, Author              
Biswas, D.2, Author
Pourovskii, L.2, Author
Kim, T. K.2, Author
Lee, T.-L.2, Author
Thakur, P. K.2, Author
Rosner, H.1, Author              
Georges, A.2, Author
Moessner, R.2, Author
Oka, T.2, Author
Mackenzie, A. P.3, Author              
King, P. D. C.2, Author
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2External Organizations, ou_persistent22              
3Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              

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 Abstract: 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. Copyright © 2020 The Authors

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Language(s): eng - English
 Dates: 2020-02-072020-02-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1126/sciadv.aaz0611
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Title: Science Advances
  Other : Sci. Adv.
Source Genre: Journal
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Publ. Info: Washington : AAAS
Pages: - Volume / Issue: 6 Sequence Number: eaaz0611 Start / End Page: 1 - 7 Identifier: ISSN: 2375-2548
CoNE: https://pure.mpg.de/cone/journals/resource/2375-2548