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  Verwey-type charge ordering transition in an open-shell p-electron compound

Adler, P., Jeglič, P., Reehuis, M., Geiß, M., Merz, P., Knaflič, T., et al. (2018). Verwey-type charge ordering transition in an open-shell p-electron compound. Science Advances, 4(1): eaap7581, pp. 1-7. doi:10.1126/sciadv.aap7581.

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Datensatz-Permalink: http://hdl.handle.net/21.11116/0000-0000-31E4-7 Versions-Permalink: http://hdl.handle.net/21.11116/0000-0000-31F0-9
Genre: Zeitschriftenartikel

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 Urheber:
Adler, Peter1, Autor              
Jeglič, Peter2, Autor
Reehuis, Manfred2, Autor
Geiß, Matthias2, Autor
Merz, Patrick3, Autor              
Knaflič, Tilen2, Autor
Komelj, Matej2, Autor
Hoser, Andreas2, Autor
Sans, Annette3, Autor              
Janek, Jürgen2, Autor
Arčon, Denis2, Autor
Jansen, Martin3, Autor              
Felser, Claudia4, Autor              
Affiliations:
1Peter Adler, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863435              
2External Organizations, ou_persistent22              
3Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Zusammenfassung: The Verwey transition in Fe3O4, a complex structural phase transition concomitant with a jump in electrical conductivity by two orders of magnitude, has been a benchmark for charge ordering (CO) phenomena in mixed-valence transition metal materials. CO is of central importance, because it frequently competes with functional properties such as superconductivity or metallic ferromagnetism. However, the CO state in Fe3O4 turned out to be complex, and the mechanism of the Verwey transition remains controversial. We demonstrate an archetypical Verwey-type transition in an open p-shell anionic mixed-valence compound using complementary diffraction and spectroscopic techniques. In Cs4O6, a phase change from a cubic structure with a single crystallographic site for the molecular O2x- building units to a tetragonal structure with ordered superoxide O2- and peroxide O22- entities is accompanied by a drastic drop in electronic conductivity and molecular charge fluctuation rates. The simple CO pattern of molecular units and the lack of magnetic order suggest Cs4O6 as a model system for disentangling the complex interplay of charge, lattice, orbital, and spin degrees of freedom in Verwey-type CO processes.

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Sprache(n): eng - Englisch
 Datum: 2018-01-192018-01-19
 Publikationsstatus: Im Druck publiziert
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1126/sciadv.aap7581
 Art des Abschluß: -

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Titel: Science Advances
  Andere : Sci. Adv.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Washington : AAAS
Seiten: - Band / Heft: 4 (1) Artikelnummer: eaap7581 Start- / Endseite: 1 - 7 Identifikator: ISSN: 2375-2548
CoNE: /journals/resource/2375-2548