Quantum fluctuation and geometrical frustration effects on electric polarization

Tsutomu Watanabe, Sumio Ishihara

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We examine theoretically the possibility of ferroelectricity caused by electronic charge order without inversion symmetry motivated by layered iron oxides. Quantum electronic models in a paired-triangular lattice are analyzed by utilizing the variational Monte Carlo simulation. Our calculations demonstrate that the combined effects of electron transfer between the layers, corresponding to quantum fluctuation between the potential minima, and geometrical frustration promote the appearance of electric polarization. Our results contrast with the conventional manner of quantum fluctuation in ferroelectricity.

Original languageEnglish
Article number113702
Journaljournal of the physical society of japan
Issue number11
Publication statusPublished - 2009 Nov
Externally publishedYes


  • Ferroelectricity
  • Frustration

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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