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  Charge disproportionation and nano phase separation in RSrNiO4

Guo, H., Li, Z. W., Chang, C. F., Hu, Z., Kuo, C.-Y., Perring, T. G., et al. (2020). Charge disproportionation and nano phase separation in RSrNiO4. Scientific Reports, 10(1): 18012, pp. 1-11. doi:10.1038/s41598-020-74884-2.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-5D3F-C Version Permalink: http://hdl.handle.net/21.11116/0000-0007-5D43-6
Genre: Journal Article

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 Creators:
Guo, H.1, Author              
Li, Z. W.1, Author              
Chang, C. F.2, Author              
Hu, Z.3, Author              
Kuo, C.-Y.1, Author              
Perring, T. G.4, Author
Schmidt, W.4, Author
Piovano, A.4, Author
Schmalzl, K.4, Author
Walker, H. C.4, Author
Lin, H. J.4, Author
Chen, C. T.4, Author
Blanco-Canosa, S.4, Author
Schlappa, J.4, Author
Schüßler-Langeheine, C.4, Author
Hansmann, P.4, Author
Khomskii, D. I.4, Author
Tjeng, L. H.5, Author              
Komarek, A. C.6, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2Chun-Fu Chang, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863447              
3Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
4External Organizations, ou_persistent22              
5Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              
6Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863446              

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Free keywords: article; excitation; phase separation
 Abstract: We have successfully grown centimeter-sized layered RSrNiO 4 single crystals under high oxygen pressures of 120–150 bar by the floating zone technique. This enabled us to perform neutron scattering experiments where we observe close to quarter-integer magnetic peaks below ∼77K that are accompanied by steep upwards dispersing spin excitations. Within the high-frequency Ni–O bond stretching phonon dispersion, a softening at the propagation vector for a checkerboard modulation can be observed. We were able to simulate the magnetic excitation spectra using a model that includes two essential ingredients, namely checkerboard charge disproportionation and nano phase separation. The results thus suggest that charge disproportionation is preferred instead of a Jahn–Teller distortion even for this layered Ni 3 + system. © 2020, The Author(s).

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Language(s): eng - English
 Dates: 2020-10-222020-10-22
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1038/s41598-020-74884-2
 Degree: -

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Title: Scientific Reports
  Abbreviation : Sci. Rep.
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 10 (1) Sequence Number: 18012 Start / End Page: 1 - 11 Identifier: ISSN: 2045-2322
CoNE: https://pure.mpg.de/cone/journals/resource/2045-2322