Orbitally induced Peierls state in spinels

D. I. Khomskii, Takashi Mizokawa

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We consider the superstructures, which can be formed in spinels containing on B sites the transition-metal ions with partially filled t2g levels. We show that, when such systems are close to the itinerant state (e.g., have an insulator-metal transition), there may appear in them an orbitally driven Peierls state. We explain by this mechanism the very unusual superstructures observed in CuIr2S4 (octamers) and MgTi2O4 (chiral superstructures) and suggest that a similar phenomenon should be observed in NaTiO2 and possibly in some other systems.

Original languageEnglish
Article number156402
JournalPhysical Review Letters
Issue number15
Publication statusPublished - 2005 Apr 22
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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