Hidden Charge Order in an Iron Oxide Square-Lattice Compound
| العنوان: | Hidden Charge Order in an Iron Oxide Square-Lattice Compound |
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| المؤلفون: | Manfred Reehuis, Sonia Francoual, Morgan C. Allison, Bernhard Keimer, Jung-hwa Kim, T. Ritschel, A. Maljuk, Pablo J. Bereciartua Perez, Pinder Dosanjh, Darren C. Peets, Andrew C. Walters, Paula M. Abdala, Philip Pattison, J. R. L. Mardegan, Peter Adler, J. Geck, Thomas Keller |
| المصدر: | Physical review letters 127(9), 097203 (1-7) (2021). doi:10.1103/PhysRevLett.127.097203 |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Diffraction, Physics, sr3fe2o7, Phase transition, Condensed matter physics, Strongly Correlated Electrons (cond-mat.str-el), neutron-diffraction, Scattering, electronic-state, transition, General Physics and Astronomy, Order (ring theory), FOS: Physical sciences, Charge (physics), Charge order, Mössbauer spectroscopy, Neutron diffraction, X ray diffraction, Neutron scattering, Square lattice, Condensed Matter - Strongly Correlated Electrons, disproportionation, ddc:530, Condensed Matter::Strongly Correlated Electrons, Superstructure (condensed matter) |
| الوصف: | Physical review letters 127(9), 097203 (1-7) (2021). doi:10.1103/PhysRevLett.127.097203 Since the discovery of charge disproportionation in the FeO₂ square-lattice compound Sr₃Fe₂O₇ by Mössbauer spectroscopy more than fifty years ago, the spatial ordering pattern of the disproportionated charges has remained “hidden” to conventional diffraction probes, despite numerous x-ray and neutron scattering studies. We have used neutron Larmor diffraction and Fe K-edge resonant x-ray scattering to demonstrate checkerboard charge order in the FeO₂ planes that vanishes at a sharp second-order phase transition upon heating above 332 K. Stacking disorder of the checkerboard pattern due to frustrated interlayer interactions broadens the corresponding superstructure reflections and greatly reduces their amplitude, thus explaining the difficulty of detecting them by conventional probes. We discuss the implications of these findings for research on “hidden order” in other materials. Published by APS, College Park, Md. |
| وصف الملف: | application/pdf |
| تدمد: | 1079-7114 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08dc4c10ea501fa9640122e38f3af0c3 https://pubmed.ncbi.nlm.nih.gov/34506205 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....08dc4c10ea501fa9640122e38f3af0c3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10797114 |
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