Orbital-driven spin-singlet formation in NaTiSi2O6

T. Shirakawa*, Y. Ohta, T. Mizokawa

*この研究の対応する著者

研究成果: Conference contribution

抄録

A Ti-oxide compound in the pyroxene family NaTiSi2O6 containing a one-dimensional Ti-O network exhibits a phase transition at T=210K, for which it has been anticipated that the spin-singlet formation is driven by the orbital ordering. We develop a theory that describes the mechanism of this phase transition. We use the Hartree-Fock approximation to the multiband d-p model and derive the groundstate phase diagram in the parameter space. We also use the perturbation theory in the strong correlation limit up to the fourth order of electron hoppings to derive the effective spin-orbital Hamiltonian. We then apply the density-matrix renormalization group method to the derived Hamiltonian and obtain the groundstate phase diagram. Experimental relevance of our results is discussed.

本文言語English
ホスト出版物のタイトルLOW TEMPERATURE PHYSICS
ホスト出版物のサブタイトル24th International Conference on Low Temperature Physics - LT24
ページ1083-1084
ページ数2
DOI
出版ステータスPublished - 2006 12 1
外部発表はい
イベントLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
継続期間: 2006 8 102006 10 17

出版物シリーズ

名前AIP Conference Proceedings
850
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
国/地域United States
CityOrlando, FL
Period06/8/1006/10/17

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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