{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T00:01:29Z","timestamp":1788134489587,"version":"build-2803163510"},"reference-count":47,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"41","content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Sci. Adv."],"published-print":{"date-parts":[[2024,10,11]]},"abstract":"<jats:p>\n            The interplay of spin-orbit coupling with other relevant parameters gives rise to the rich phase competition in complex ruthenates featuring octahedrally coordinated Ru\n            <jats:sup>4+<\/jats:sup>\n            . While locally, spin-orbit coupling stabilizes a nonmagnetic\n            <jats:italic>J<\/jats:italic>\n            <jats:sub>eff<\/jats:sub>\n            = 0 state, intersite interactions resolve one of two distinct phases at low temperatures: an excitonic magnet stabilized by the magnetic exchange of upper-lying\n            <jats:italic>J<\/jats:italic>\n            <jats:sub>eff<\/jats:sub>\n            = 1 states or Ru\n            <jats:sub>2<\/jats:sub>\n            molecular orbital dimers driven by direct orbital overlap. Pyrochlore ruthenates\n            <jats:italic>A<\/jats:italic>\n            <jats:sub>2<\/jats:sub>\n            Ru\n            <jats:sub>2<\/jats:sub>\n            O\n            <jats:sub>7<\/jats:sub>\n            (\n            <jats:italic>A<\/jats:italic>\n            = rare earth, Y) are candidate excitonic magnets with geometrical frustration. We synthesized In\n            <jats:sub>2<\/jats:sub>\n            Ru\n            <jats:sub>2<\/jats:sub>\n            O\n            <jats:sub>7<\/jats:sub>\n            with covalent In\u2500O bonds. This pyrochlore ruthenate hosts a local\n            <jats:italic>J<\/jats:italic>\n            <jats:sub>eff<\/jats:sub>\n            = 0 state at high temperatures; however, at low temperatures, it forms a unique nonmagnetic ground state with nearly linear Ru\u2500O\u2500Ru molecules, in stark contrast to other\n            <jats:italic>A<\/jats:italic>\n            <jats:sub>2<\/jats:sub>\n            Ru\n            <jats:sub>2<\/jats:sub>\n            O\n            <jats:sub>7<\/jats:sub>\n            compounds. The disproportionation of covalent In\u2500O bonds drives Ru\n            <jats:sub>2<\/jats:sub>\n            O molecule formation, quenching not only the local spin-orbit singlet but also geometrical frustration.\n          <\/jats:p>","DOI":"10.1126\/sciadv.adn3880","type":"journal-article","created":{"date-parts":[[2024,10,9]],"date-time":"2024-10-09T17:58:51Z","timestamp":1728496731000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":6,"title":["Nearly linear orbital molecules on a pyrochlore lattice"],"prefix":"10.1126","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0535-7784","authenticated-orcid":true,"given":"Aleksandra","family":"Krajewska","sequence":"first","affiliation":[{"name":"Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany."},{"name":"Institute for Functional Matter and Quantum Technologies, University of Stuttgart, 70550 Stuttgart, Germany."},{"name":"ISIS Neutron and 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