Charge-stripe order in the electronic ferroelectric LuFe2O4

Y. Zhang; H. X. Yang; C. Ma; H. F. Tian; J. Q. Li *

doi:10.1103/PhysRevLett.98.247602

Charge-stripe order in the electronic ferroelectric LuFe2O4

Materials Science 2009-11-13 v1 Strongly Correlated Electrons

Authors: Y. Zhang , H. X. Yang , C. Ma , H. F. Tian , J. Q. Li *

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Abstract

The structural features of the charge ordering states in LuFe2O4 are characterized by in-situ cooling TEM observations from 300K down to 20K. Two distinctive structural modulations, a major q1= (1/3, 1/3, 2) and a weak q2=q1/10 + (0, 0, 3/2), have been well determined at the temperature of 20K. Systematic analysis demonstrates that the charges at low temperatures are well crystallized in a charge stripe phase, in which the charge density wave behaviors in a non-sinusoidal fashion resulting in elemental electric dipoles for ferroelectricity. It is also noted that the charge ordering and ferroelectric domains often change markedly with lowering temperatures and yields a rich variety of structural phenomena.

Keywords

charge stripe order electronic ferroelectricity LuFe2O4 charge ordering transmission electron microscopy structural modulation

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@article{arxiv.cond-mat/0702588,
  title  = {Charge-stripe order in the electronic ferroelectric LuFe2O4},
  author = {Y. Zhang and H. X. Yang and C. Ma and H. F. Tian and J. Q. Li *},
  journal= {arXiv preprint arXiv:cond-mat/0702588},
  year   = {2009}
}

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15 pages, 4 figures

Charge-stripe order in the electronic ferroelectric LuFe2O4

Abstract

Keywords

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