Stripe charge ordering in triangular-lattice systems

Onishi, Hiroaki ; Hotta, Takashi

We investigate the ground-state property of a $t_{rm 2g}$ -orbital Hubbard model on a triangular lattice at electron density 5.5 by using numerical techniques. There appears 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 ordering. It is found that charge stripe stabilized by the nearest-neighbor Coulomb interaction consists 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.

Language	:	English
Journal	:	AIP Conference Proceedings 850
Volume	:
Number	:
Pages	:	p.1075 - 1076
Publication Year/Month	:	2006/09
Meeting title	:	24th International Conference on Low Temperature Physics (LT-24)
Held date	:	2005/08
Location (city)	:	Orlando
Location (country)	:	U.S.A.
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Paper URL	:	https://doi.org/10.1063/1.2355076
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	三角格子; $t_{rm 2g}$ 軌道自由度; 電荷ストライプ
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Registration No. : B20050611
JAEA Abstracts No. : 35000648
Paper Submission No. : 2136

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