Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-08-18
AIP Conference Proceedings 850, 1075 (2006)
Physics
Condensed Matter
Strongly Correlated Electrons
2 pages, 2 figures, Proceedings of LT24 (August 10-17, 2005, Orlando)
Scientific paper
10.1063/1.2355076
We investigate the ground-state properties of a t2g-orbital Hubbard model on a triangular lattice at electron density 5.5 by using numerical techniques. There appear several types of paramagnetic phases, but we observe in common that one or two orbitals among three orbitals become relevant due to the effect of orbital arrangement. It is found that charge stripes stabilized by the nearest-neighbor Coulomb interaction consist of antiferromagnetic/ferro-orbital chains for small Hund's coupling, while there occurs stripe charge ordering with ferromagnetic/antiferro-orbital chains for large Hund's coupling.
Hotta Takashi
Onishi Hiroaki
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