Pinball liquid phase from Hund's coupling in frustrated transition-metal oxides
Entity
UAM. Departamento de Física Teórica de la Materia CondensadaPublisher
American Physical SocietyDate
2015-04-30Citation
10.1103/PhysRevB.91.165139
Physical Review B - Condensed Matter and Materials Physics 91.16 (2015): 165139
ISSN
1098-0121 (print); 1550-235X (online)DOI
10.1103/PhysRevB.91.165139Funded by
J.M. acknowledges financial support from MINECO (MAT2012-37263-C02-01). This work is supported by the French National Research Agency through Grants No. ANR-12-JS04-0003-01 SUBRISSYME and No. ANR-2010-BLANC-0406-0 NQPTPProject
Gobierno de España. MAT2012-37263-C02-01Editor's Version
http://dx.doi.org/10.1103/PhysRevB.91.165139Subjects
Hund’s coupling; Hubbard model; Robust pinball; Transition-metal oxides; FísicaRights
©2015 American Physical SocietyAbstract
The interplay of nonlocal Coulomb repulsion and Hund’s coupling in the d-orbital manifold in frustrated triangular lattices is analyzed by a multiband extended Hubbard model.We find a rich phase diagram with several competing phases, including a robust pinball liquid phase, which is an unconventional metal characterized by threefold charge order, bad metallic behavior, and the emergence of high-spin local moments. Our results naturally explain the anomalous charge-ordered metallic state observed in the triangular layered compound AgNiO2. The potential relevance to other triangular transition-metal oxides is discussed
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Google Scholar:Ralko, Arnaud
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Merino Troncoso, Jaime
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Fratini, Simone
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