Topological insulators from spontaneous symmetry breaking induced by electron correlation on pyrochlore lattices

Moyuru Kurita, Youhei Yamaji*, Masatoshi Imada

*この研究の対応する著者

研究成果: Article査読

55 被引用数 (Scopus)

抄録

We study an extended Hubbard model with the nearest-neighbor Coulomb interaction on the pyrochlore lattice at half filling. An interaction-driven insulating phase with nontrivial Z2 invariants emerges at the Hartree-Fock meanfield level in the phase diagram. This topological insulator phase competes with other ordered states and survives in a parameter region surrounded by a semimetal, antiferromagnetic and charge ordered insulators. The symmetries of these phases are group-theoretically analyzed. We also show that the ferromagnetic interaction enhances the stability of the topological phase.

本文言語English
論文番号044708
ジャーナルjournal of the physical society of japan
80
4
DOI
出版ステータスPublished - 2011 4
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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