2009/05/02 by Tsutomu Watanabe, Sumio Ishihara · 13 citations
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Chemistry #Condensed matter physics #Dielectric #Electron #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Frustration #Hubbard model #Lattice (music) #Mathematics #Maxima and minima #Monte Carlo method #Multiferroics and related materials #Physics #Point reflection #Polarization (electrochemistry) #Quantum #Quantum fluctuation #Quantum mechanics #Statistical physics #Theoretical and Computational Physics #Variational Monte Carlo #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.78.113702
published in Journal of the Physical Society of Japan 78(11), 113702 (Physical Society of Japan) · 5 pages, 4 figures
arxiv created 2009/05/02 · openalex publication_date 2009/10/26 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We examine theoretically a 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 calculation demonstrates that combined effects of electron transfer between the layers, corresponding to quantum fluctuation between the potential minima, and geometrical frustration promote appearance of an electric polarization. Present results are in contrast to the conventional manner of quantum fluctuation in ferroelectricity.