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Charge Order at the...
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Kimber, Simon A. J.
(author)
Charge Order at the Frontier between the Molecular and Solid States in Ba3NaRu2O9
- Article/chapterEnglish2012
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LIBRIS-ID:oai:lup.lub.lu.se:e85b42a7-4c80-4f6b-9ce2-03506e24948c
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https://lup.lub.lu.se/record/2802874URI
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https://doi.org/10.1103/PhysRevLett.108.217205DOI
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Language:English
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Summary in:English
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We show that the valence electrons of Ba3NaRu2O9, which has a quasimolecular structure, completely crystallize below 210 K. Using an extended Hubbard model, we show that the charge ordering instability results from long-range Coulomb interactions. However, orbital ordering, metal-metal bonding, and formation of a partial spin gap enforce the magnitude of the charge separation. The striped charge order and frustrated hcp lattice of Ru2O9 dimers lead to competition with a quasidegenerate charge-melted phase under photoexcitation at low temperature. Our results establish a broad class of simple metal oxides as models for emergent phenomena at the border between the molecular and solid states.
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Senn, Mark S.
(author)
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Fratini, Simone
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Wu, Hua
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Hill, Adrian H.
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Manuel, Pascal
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Attfield, J. Paul
(author)
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Argyriou, DimitriLund University,Lunds universitet,European Spallation Source ESS AB,Stiftelser och övriga anknutna verksamheter,Other Institutions and Utilities(Swepub:lu)esss-dau
(author)
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Henry, PaulLund University,Lunds universitet,European Spallation Source ESS AB,Stiftelser och övriga anknutna verksamheter,Other Institutions and Utilities(Swepub:lu)esss-plh
(author)
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European Spallation Source ESS ABStiftelser och övriga anknutna verksamheter
(creator_code:org_t)
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In:Physical Review Letters108:211079-7114
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